[linux-next] LinuxNextTracking branch, master, updated. next-20240508

The following commit has been merged in the master branch: commit 1eb2cded45b35816085c1f962933c187d970f9dc Author: Eric Dumazet edumazet@google.com Date: Mon May 6 10:28:12 2024 +0000

net: annotate writes on dev->mtu from ndo_change_mtu()

Simon reported that ndo_change_mtu() methods were never updated to use WRITE_ONCE(dev->mtu, new_mtu) as hinted in commit 501a90c94510 ("inet: protect against too small mtu values.")

We read dev->mtu without holding RTNL in many places, with READ_ONCE() annotations.

It is time to take care of ndo_change_mtu() methods to use corresponding WRITE_ONCE()

Signed-off-by: Eric Dumazet edumazet@google.com Reported-by: Simon Horman horms@kernel.org Closes: https://lore.kernel.org/netdev/20240505144608.GB67882@kernel.org/ Reviewed-by: Jacob Keller jacob.e.keller@intel.com Reviewed-by: Sabrina Dubroca sd@queasysnail.net Reviewed-by: Simon Horman horms@kernel.org Acked-by: Shannon Nelson shannon.nelson@amd.com Link: https://lore.kernel.org/r/20240506102812.3025432-1-edumazet@google.com Signed-off-by: Jakub Kicinski kuba@kernel.org

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 6f2a688fccbfb..32f6a28b02b1e 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -238,7 +238,7 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu) ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", priv->mcast_mtu);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

@@ -265,7 +265,7 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu) if (carrier_status) netif_carrier_on(dev); } else { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); }

return ret; diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index b3a7d60c3a5ca..3b0c7758ea4f4 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -4710,7 +4710,7 @@ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) } }

- bond_dev->mtu = new_mtu; + WRITE_ONCE(bond_dev->mtu, new_mtu);

return 0;

diff --git a/drivers/net/can/dev/dev.c b/drivers/net/can/dev/dev.c index 3a3be5cdfc1f8..83e724e0ab871 100644 --- a/drivers/net/can/dev/dev.c +++ b/drivers/net/can/dev/dev.c @@ -338,7 +338,7 @@ int can_change_mtu(struct net_device *dev, int new_mtu) return -EINVAL; }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; } EXPORT_SYMBOL_GPL(can_change_mtu); diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c index 285635c234432..f67e858071007 100644 --- a/drivers/net/can/vcan.c +++ b/drivers/net/can/vcan.c @@ -140,7 +140,7 @@ static int vcan_change_mtu(struct net_device *dev, int new_mtu) !can_is_canxl_dev_mtu(new_mtu)) return -EINVAL;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/can/vxcan.c b/drivers/net/can/vxcan.c index f7fabba707ea6..9e1b7d41005f8 100644 --- a/drivers/net/can/vxcan.c +++ b/drivers/net/can/vxcan.c @@ -135,7 +135,7 @@ static int vxcan_change_mtu(struct net_device *dev, int new_mtu) !can_is_canxl_dev_mtu(new_mtu)) return -EINVAL;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/ethernet/agere/et131x.c b/drivers/net/ethernet/agere/et131x.c index 3d9220f9c9fe7..b325e0cef120f 100644 --- a/drivers/net/ethernet/agere/et131x.c +++ b/drivers/net/ethernet/agere/et131x.c @@ -3852,7 +3852,7 @@ static int et131x_change_mtu(struct net_device *netdev, int new_mtu)

et131x_disable_txrx(netdev);

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

et131x_adapter_memory_free(adapter);

diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c index eafef84fe3be5..3d8ac63132fb2 100644 --- a/drivers/net/ethernet/alteon/acenic.c +++ b/drivers/net/ethernet/alteon/acenic.c @@ -2539,7 +2539,7 @@ static int ace_change_mtu(struct net_device *dev, int new_mtu) struct ace_regs __iomem *regs = ap->regs;

writel(new_mtu + ETH_HLEN + 4, &regs->IfMtu); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (new_mtu > ACE_STD_MTU) { if (!(ap->jumbo)) { diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c index 1c8763be0e4b3..3c112c18ae6ae 100644 --- a/drivers/net/ethernet/altera/altera_tse_main.c +++ b/drivers/net/ethernet/altera/altera_tse_main.c @@ -788,7 +788,7 @@ static int tse_change_mtu(struct net_device *dev, int new_mtu) return -EBUSY; }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); netdev_update_features(dev);

return 0; diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index be5acfa41ee0c..28eaedaf713d5 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -104,7 +104,7 @@ static int ena_change_mtu(struct net_device *dev, int new_mtu) if (!ret) { netif_dbg(adapter, drv, dev, "Set MTU to %d\n", new_mtu); update_rx_ring_mtu(adapter, new_mtu); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); } else { netif_err(adapter, drv, dev, "Failed to set MTU to %d\n", new_mtu); diff --git a/drivers/net/ethernet/amd/amd8111e.c b/drivers/net/ethernet/amd/amd8111e.c index c1b5e9a94308c..f64f96fa17cfe 100644 --- a/drivers/net/ethernet/amd/amd8111e.c +++ b/drivers/net/ethernet/amd/amd8111e.c @@ -1520,9 +1520,9 @@ static int amd8111e_change_mtu(struct net_device *dev, int new_mtu)

if (!netif_running(dev)) { /* new_mtu will be used - * when device starts netxt time + * when device starts next time */ - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

@@ -1531,7 +1531,7 @@ static int amd8111e_change_mtu(struct net_device *dev, int new_mtu) /* stop the chip */ writel(RUN, lp->mmio + CMD0);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

err = amd8111e_restart(dev); spin_unlock_irq(&lp->lock); diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c index 6b73648b37793..c4a4e316683fa 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -2070,7 +2070,7 @@ static int xgbe_change_mtu(struct net_device *netdev, int mtu) return ret;

pdata->rx_buf_size = ret; - netdev->mtu = mtu; + WRITE_ONCE(netdev->mtu, mtu);

xgbe_restart_dev(pdata);

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index 44900026d11b5..4af9d89d5f88b 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -1530,7 +1530,7 @@ static int xgene_change_mtu(struct net_device *ndev, int new_mtu) frame_size = (new_mtu > ETH_DATA_LEN) ? (new_mtu + 18) : 0x600;

xgene_enet_close(ndev); - ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu); pdata->mac_ops->set_framesize(pdata, frame_size); xgene_enet_open(ndev);

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_main.c b/drivers/net/ethernet/aquantia/atlantic/aq_main.c index 0b2a52199914b..c1d1673c5749d 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_main.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_main.c @@ -146,7 +146,7 @@ static int aq_ndev_change_mtu(struct net_device *ndev, int new_mtu)

if (err < 0) goto err_exit; - ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

err_exit: return err; diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c index 0f2f400b5bc49..a38be924cdaa0 100644 --- a/drivers/net/ethernet/atheros/ag71xx.c +++ b/drivers/net/ethernet/atheros/ag71xx.c @@ -1788,7 +1788,7 @@ static int ag71xx_change_mtu(struct net_device *ndev, int new_mtu) { struct ag71xx *ag = netdev_priv(ndev);

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu); ag71xx_wr(ag, AG71XX_REG_MAC_MFL, ag71xx_max_frame_len(ndev->mtu));

diff --git a/drivers/net/ethernet/atheros/alx/main.c b/drivers/net/ethernet/atheros/alx/main.c index 49bb9a8f00e64..3d28654e5df77 100644 --- a/drivers/net/ethernet/atheros/alx/main.c +++ b/drivers/net/ethernet/atheros/alx/main.c @@ -1176,7 +1176,7 @@ static int alx_change_mtu(struct net_device *netdev, int mtu) struct alx_priv *alx = netdev_priv(netdev); int max_frame = ALX_MAX_FRAME_LEN(mtu);

- netdev->mtu = mtu; + WRITE_ONCE(netdev->mtu, mtu); alx->hw.mtu = mtu; alx->rxbuf_size = max(max_frame, ALX_DEF_RXBUF_SIZE); netdev_update_features(netdev); diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c index 46cdc32b4e317..c571614b1d501 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c @@ -561,7 +561,7 @@ static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) if (netif_running(netdev)) { while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) msleep(1); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); adapter->hw.max_frame_size = new_mtu; atl1c_set_rxbufsize(adapter, netdev); atl1c_down(adapter); diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c index 5f2a6fcba9670..9b778b34b67ef 100644 --- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c +++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c @@ -428,7 +428,7 @@ static int atl1e_change_mtu(struct net_device *netdev, int new_mtu) if (netif_running(netdev)) { while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) msleep(1); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); adapter->hw.max_frame_size = new_mtu; adapter->hw.rx_jumbo_th = (max_frame + 7) >> 3; atl1e_down(adapter); diff --git a/drivers/net/ethernet/atheros/atlx/atl1.c b/drivers/net/ethernet/atheros/atlx/atl1.c index a9014d7932dbf..3afd3627ce485 100644 --- a/drivers/net/ethernet/atheros/atlx/atl1.c +++ b/drivers/net/ethernet/atheros/atlx/atl1.c @@ -2687,7 +2687,7 @@ static int atl1_change_mtu(struct net_device *netdev, int new_mtu) adapter->rx_buffer_len = (max_frame + 7) & ~7; adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); if (netif_running(netdev)) { atl1_down(adapter); atl1_up(adapter); diff --git a/drivers/net/ethernet/atheros/atlx/atl2.c b/drivers/net/ethernet/atheros/atlx/atl2.c index bcfc9488125b1..fa9a4919f25d4 100644 --- a/drivers/net/ethernet/atheros/atlx/atl2.c +++ b/drivers/net/ethernet/atheros/atlx/atl2.c @@ -905,7 +905,7 @@ static int atl2_change_mtu(struct net_device *netdev, int new_mtu) struct atl2_hw *hw = &adapter->hw;

/* set MTU */ - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); hw->max_frame_size = new_mtu; ATL2_WRITE_REG(hw, REG_MTU, new_mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN); diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c index 1be6d14030bcf..e5809ad5eb827 100644 --- a/drivers/net/ethernet/broadcom/b44.c +++ b/drivers/net/ethernet/broadcom/b44.c @@ -1042,13 +1042,13 @@ static int b44_change_mtu(struct net_device *dev, int new_mtu) /* We'll just catch it later when the * device is up'd. */ - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

spin_lock_irq(&bp->lock); b44_halt(bp); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); b44_init_rings(bp); b44_init_hw(bp, B44_FULL_RESET); spin_unlock_irq(&bp->lock); diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c index 3196c4dea0769..3c0e3b9828be9 100644 --- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c @@ -1652,7 +1652,7 @@ static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu) priv->rx_frag_size = SKB_DATA_ALIGN(priv->rx_buf_offset + priv->rx_buf_size) + SKB_DATA_ALIGN(sizeof(struct skb_shared_info));

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c index b65b8592ad759..6ec773e61182d 100644 --- a/drivers/net/ethernet/broadcom/bnx2.c +++ b/drivers/net/ethernet/broadcom/bnx2.c @@ -7912,7 +7912,7 @@ bnx2_change_mtu(struct net_device *dev, int new_mtu) { struct bnx2 *bp = netdev_priv(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return bnx2_change_ring_size(bp, bp->rx_ring_size, bp->tx_ring_size, false); } diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c index c9b6acd8c892d..a8e07e51418fd 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c @@ -4902,7 +4902,7 @@ int bnx2x_change_mtu(struct net_device *dev, int new_mtu) * because the actual alloc size is * only updated as part of load */ - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (!bnx2x_mtu_allows_gro(new_mtu)) dev->features &= ~NETIF_F_GRO_HW; diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 0d1ed6e5dfbd2..c437ca1c0fd39 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -14280,7 +14280,7 @@ static int bnxt_change_mtu(struct net_device *dev, int new_mtu) if (netif_running(dev)) bnxt_close_nic(bp, true, false);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); bnxt_set_ring_params(bp);

if (netif_running(dev)) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index e6ff3c9bd7e50..1589a49b876c9 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -14295,7 +14295,7 @@ static void tg3_set_rx_mode(struct net_device *dev) static inline void tg3_set_mtu(struct net_device *dev, struct tg3 *tp, int new_mtu) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (new_mtu > ETH_DATA_LEN) { if (tg3_flag(tp, 5780_CLASS)) { diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c index c32174484a967..fe121d36112d5 100644 --- a/drivers/net/ethernet/brocade/bna/bnad.c +++ b/drivers/net/ethernet/brocade/bna/bnad.c @@ -3276,7 +3276,7 @@ bnad_change_mtu(struct net_device *netdev, int new_mtu) mutex_lock(&bnad->conf_mutex);

mtu = netdev->mtu; - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

frame = BNAD_FRAME_SIZE(mtu); new_frame = BNAD_FRAME_SIZE(new_mtu); diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 898debfd4db36..241ce9a2fa991 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -3022,7 +3022,7 @@ static int macb_change_mtu(struct net_device *dev, int new_mtu) if (netif_running(dev)) return -EBUSY;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c index 5e97f1e4e38e8..a71b320fd0308 100644 --- a/drivers/net/ethernet/calxeda/xgmac.c +++ b/drivers/net/ethernet/calxeda/xgmac.c @@ -1358,7 +1358,7 @@ static int xgmac_change_mtu(struct net_device *dev, int new_mtu)

/* Bring interface down, change mtu and bring interface back up */ xgmac_stop(dev); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return xgmac_open(dev); }

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_core.c b/drivers/net/ethernet/cavium/liquidio/lio_core.c index f38d31bfab1bb..674c548318750 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_core.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c @@ -1262,7 +1262,7 @@ int liquidio_change_mtu(struct net_device *netdev, int new_mtu) return -EINVAL; }

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); lio->mtu = new_mtu;

WRITE_ONCE(sc->caller_is_done, true); diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c index aa6c0dfb6f1ca..96c6ea12279f8 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c @@ -218,7 +218,7 @@ lio_vf_rep_change_mtu(struct net_device *ndev, int new_mtu) return -EIO; }

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c b/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c index 007d4b06819ef..744f2434f7fa5 100644 --- a/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c +++ b/drivers/net/ethernet/cavium/octeon/octeon_mgmt.c @@ -649,7 +649,7 @@ static int octeon_mgmt_change_mtu(struct net_device *netdev, int new_mtu) struct octeon_mgmt *p = netdev_priv(netdev); int max_packet = new_mtu + ETH_HLEN + ETH_FCS_LEN;

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

/* HW lifts the limit if the frame is VLAN tagged * (+4 bytes per each tag, up to two tags) diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index eff350e0bc2a8..aebb9fef3f6eb 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -1589,7 +1589,7 @@ static int nicvf_change_mtu(struct net_device *netdev, int new_mtu) return -EINVAL; }

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (!netif_running(netdev)) return 0; diff --git a/drivers/net/ethernet/chelsio/cxgb/cxgb2.c b/drivers/net/ethernet/chelsio/cxgb/cxgb2.c index d2286adf09fed..7d7d3e0098df2 100644 --- a/drivers/net/ethernet/chelsio/cxgb/cxgb2.c +++ b/drivers/net/ethernet/chelsio/cxgb/cxgb2.c @@ -844,7 +844,7 @@ static int t1_change_mtu(struct net_device *dev, int new_mtu) return -EOPNOTSUPP; if ((ret = mac->ops->set_mtu(mac, new_mtu))) return ret; - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c index 2236f1d35f2b8..f92a3550e4800 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c +++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c @@ -2559,7 +2559,7 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu)

if ((ret = t3_mac_set_mtu(&pi->mac, new_mtu))) return ret; - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); init_port_mtus(adapter); if (adapter->params.rev == 0 && offload_running(adapter)) t3_load_mtus(adapter, adapter->params.mtus, diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c index 2eb33a727bba3..2418645c88237 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -3180,7 +3180,7 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu) ret = t4_set_rxmode(pi->adapter, pi->adapter->mbox, pi->viid, pi->viid_mirror, new_mtu, -1, -1, -1, -1, true); if (!ret) - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return ret; }

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c index 9ba0864592e85..2fbe0f059a0bf 100644 --- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c @@ -1169,7 +1169,7 @@ static int cxgb4vf_change_mtu(struct net_device *dev, int new_mtu) ret = t4vf_set_rxmode(pi->adapter, pi->viid, new_mtu, -1, -1, -1, -1, true); if (!ret) - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return ret; }

diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index d266a87297a5e..f604119efc809 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -2027,7 +2027,7 @@ static int _enic_change_mtu(struct net_device *netdev, int new_mtu) return err; }

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (running) { err = enic_open(netdev); diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c index 705c3eb19cd3f..2f98f644b9d7b 100644 --- a/drivers/net/ethernet/cortina/gemini.c +++ b/drivers/net/ethernet/cortina/gemini.c @@ -1978,7 +1978,7 @@ static int gmac_change_mtu(struct net_device *netdev, int new_mtu)

gmac_disable_tx_rx(netdev);

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); gmac_update_config0_reg(netdev, max_len << CONFIG0_MAXLEN_SHIFT, CONFIG0_MAXLEN_MASK);

diff --git a/drivers/net/ethernet/dlink/sundance.c b/drivers/net/ethernet/dlink/sundance.c index aaf0eda962922..8af5ecec7d614 100644 --- a/drivers/net/ethernet/dlink/sundance.c +++ b/drivers/net/ethernet/dlink/sundance.c @@ -708,7 +708,7 @@ static int change_mtu(struct net_device *dev, int new_mtu) { if (netif_running(dev)) return -EBUSY; - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/ethernet/faraday/ftmac100.c b/drivers/net/ethernet/faraday/ftmac100.c index 003bc9a45c659..1047c805054ea 100644 --- a/drivers/net/ethernet/faraday/ftmac100.c +++ b/drivers/net/ethernet/faraday/ftmac100.c @@ -1092,7 +1092,7 @@ static int ftmac100_change_mtu(struct net_device *netdev, int mtu) } iowrite32(maccr, priv->base + FTMAC100_OFFSET_MACCR);

- netdev->mtu = mtu; + WRITE_ONCE(netdev->mtu, mtu);

return 0; } diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c index dcbc598b11c6c..baa0b3c2ce6ff 100644 --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c @@ -2995,7 +2995,7 @@ static int dpaa_change_mtu(struct net_device *net_dev, int new_mtu) if (priv->xdp_prog && !xdp_validate_mtu(priv, new_mtu)) return -EINVAL;

- net_dev->mtu = new_mtu; + WRITE_ONCE(net_dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c index 40e8818295951..6866807973daa 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c @@ -2698,7 +2698,7 @@ static int dpaa2_eth_change_mtu(struct net_device *dev, int new_mtu) return err;

out: - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c index f3543a2df68d5..a71f848adc054 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c @@ -590,7 +590,7 @@ static int dpaa2_switch_port_change_mtu(struct net_device *netdev, int mtu) return err; }

- netdev->mtu = mtu; + WRITE_ONCE(netdev->mtu, mtu); return 0; }

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index a811238c018de..2baef59f741dd 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -2026,7 +2026,7 @@ static int gfar_change_mtu(struct net_device *dev, int new_mtu) if (dev->flags & IFF_UP) stop_gfar(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (dev->flags & IFF_UP) startup_gfar(dev); diff --git a/drivers/net/ethernet/fungible/funeth/funeth_main.c b/drivers/net/ethernet/fungible/funeth/funeth_main.c index df86770731ad5..ac86179a0a817 100644 --- a/drivers/net/ethernet/fungible/funeth/funeth_main.c +++ b/drivers/net/ethernet/fungible/funeth/funeth_main.c @@ -927,7 +927,7 @@ static int fun_change_mtu(struct net_device *netdev, int new_mtu)

rc = fun_port_write_cmd(fp, FUN_ADMIN_PORT_KEY_MTU, new_mtu); if (!rc) - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); return rc; }

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 8a713eed44658..fd32e15cadcb4 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -1777,7 +1777,7 @@ static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu) }

/* finally, set new mtu to netdevice */ - ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

out: if (if_running) { diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 19668a8d22f76..dfdc0e032c078 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -2761,7 +2761,7 @@ static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu) netdev_err(netdev, "failed to change MTU in hardware %d\n", ret); else - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

return ret; } diff --git a/drivers/net/ethernet/huawei/hinic/hinic_main.c b/drivers/net/ethernet/huawei/hinic/hinic_main.c index 499c657d37a96..890f213da8d18 100644 --- a/drivers/net/ethernet/huawei/hinic/hinic_main.c +++ b/drivers/net/ethernet/huawei/hinic/hinic_main.c @@ -581,7 +581,7 @@ static int hinic_change_mtu(struct net_device *netdev, int new_mtu) if (err) netif_err(nic_dev, drv, netdev, "Failed to set port mtu\n"); else - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

return err; } diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index e6e47b1842ea7..a19d098f2e2bf 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -1098,7 +1098,7 @@ static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu) /* This is to prevent starting RX channel in emac_rx_enable() */ set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);

- dev->ndev->mtu = new_mtu; + WRITE_ONCE(dev->ndev->mtu, new_mtu); emac_full_tx_reset(dev); }

@@ -1130,7 +1130,7 @@ static int emac_change_mtu(struct net_device *ndev, int new_mtu) }

if (!ret) { - ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu); dev->rx_skb_size = emac_rx_skb_size(new_mtu); dev->rx_sync_size = emac_rx_sync_size(new_mtu); } diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index b5aef0b29efea..4c9d9badd6986 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1537,7 +1537,7 @@ static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) adapter->rx_buff_pool[i].active = 1;

if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); vio_cmo_set_dev_desired(viodev, ibmveth_get_desired_dma (viodev)); diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c index 5b43f9b194fc2..60fff9a6c53e3 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -3569,7 +3569,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)

netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) e1000_up(adapter); diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index bef65ee4c549a..220d62fca55d1 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -6038,7 +6038,7 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu) adapter->max_frame_size = max_frame; netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

pm_runtime_get_sync(netdev->dev.parent);

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 2cc7bec0557b3..143e37ae88efd 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -2961,7 +2961,7 @@ static int i40e_change_mtu(struct net_device *netdev, int new_mtu)

netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); if (netif_running(netdev)) i40e_vsi_reinit_locked(vsi); set_bit(__I40E_CLIENT_SERVICE_REQUESTED, pf->state); diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c index d4f4fd6a10016..d4699c4c535d4 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_main.c +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c @@ -4296,7 +4296,7 @@ static int iavf_change_mtu(struct net_device *netdev, int new_mtu)

netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) { iavf_schedule_reset(adapter, IAVF_FLAG_RESET_NEEDED); diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index 06549dae4cca6..125c53c518984 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -7770,7 +7770,7 @@ static int ice_change_mtu(struct net_device *netdev, int new_mtu) return -EBUSY; }

- netdev->mtu = (unsigned int)new_mtu; + WRITE_ONCE(netdev->mtu, (unsigned int)new_mtu); err = ice_down_up(vsi); if (err) return err; diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c index 5d3532c27d57f..52ceda6306a3d 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_lib.c +++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c @@ -2234,7 +2234,7 @@ static int idpf_change_mtu(struct net_device *netdev, int new_mtu) idpf_vport_ctrl_lock(netdev); vport = idpf_netdev_to_vport(netdev);

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

err = idpf_initiate_soft_reset(vport, IDPF_SR_MTU_CHANGE);

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 74a998fcaa6f3..7d9389040e404 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -6641,7 +6641,7 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)

netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) igb_up(adapter); diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c index 40ccd24ffc539..7661edd7d0f2c 100644 --- a/drivers/net/ethernet/intel/igbvf/netdev.c +++ b/drivers/net/ethernet/intel/igbvf/netdev.c @@ -2434,7 +2434,7 @@ static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)

netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) igbvf_up(adapter); diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 34c257a51ed1f..c30f0f5726007 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -5275,7 +5275,7 @@ static int igc_change_mtu(struct net_device *netdev, int new_mtu) igc_down(adapter);

netdev_dbg(netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) igc_up(adapter); diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 43e7e75ae18c0..094653e81b97a 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -6847,7 +6847,7 @@ static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu) netdev->mtu, new_mtu);

/* must set new MTU before calling down or up */ - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) ixgbe_reinit_locked(adapter); diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 3161a13079fe6..b938dc06045d0 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -4292,7 +4292,7 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu) netdev->mtu, new_mtu);

/* must set new MTU before calling down or up */ - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) ixgbevf_reinit_locked(adapter); diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c index 1732ec3c3dbdc..b06e245629739 100644 --- a/drivers/net/ethernet/jme.c +++ b/drivers/net/ethernet/jme.c @@ -2301,7 +2301,7 @@ jme_change_mtu(struct net_device *netdev, int new_mtu) { struct jme_adapter *jme = netdev_priv(netdev);

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); netdev_update_features(netdev);

jme_restart_rx_engine(jme); diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c index 1d5b7bb6380f9..5352fee62d2b8 100644 --- a/drivers/net/ethernet/lantiq_etop.c +++ b/drivers/net/ethernet/lantiq_etop.c @@ -519,7 +519,7 @@ ltq_etop_change_mtu(struct net_device *dev, int new_mtu) struct ltq_etop_priv *priv = netdev_priv(dev); unsigned long flags;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

spin_lock_irqsave(&priv->lock, flags); ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu, LTQ_ETOP_IGPLEN); diff --git a/drivers/net/ethernet/lantiq_xrx200.c b/drivers/net/ethernet/lantiq_xrx200.c index 8bd4def3622e1..07904a528f215 100644 --- a/drivers/net/ethernet/lantiq_xrx200.c +++ b/drivers/net/ethernet/lantiq_xrx200.c @@ -419,7 +419,7 @@ xrx200_change_mtu(struct net_device *net_dev, int new_mtu) int curr_desc; int ret = 0;

- net_dev->mtu = new_mtu; + WRITE_ONCE(net_dev->mtu, new_mtu); priv->rx_buf_size = xrx200_buffer_size(new_mtu); priv->rx_skb_size = xrx200_skb_size(priv->rx_buf_size);

@@ -440,7 +440,7 @@ xrx200_change_mtu(struct net_device *net_dev, int new_mtu) buff = ch_rx->rx_buff[ch_rx->dma.desc]; ret = xrx200_alloc_buf(ch_rx, netdev_alloc_frag); if (ret) { - net_dev->mtu = old_mtu; + WRITE_ONCE(net_dev->mtu, old_mtu); priv->rx_buf_size = xrx200_buffer_size(old_mtu); priv->rx_skb_size = xrx200_skb_size(priv->rx_buf_size); break; diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c index f0bdc06d253d5..f35ae2c88091d 100644 --- a/drivers/net/ethernet/marvell/mv643xx_eth.c +++ b/drivers/net/ethernet/marvell/mv643xx_eth.c @@ -2562,7 +2562,7 @@ static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) { struct mv643xx_eth_private *mp = netdev_priv(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); mv643xx_eth_recalc_skb_size(mp); tx_set_rate(mp, 1000000000, 16777216);

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 26bf5d47ba027..41894834fb53c 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -3861,7 +3861,7 @@ static int mvneta_change_mtu(struct net_device *dev, int mtu) return -EINVAL; }

- dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu);

if (!netif_running(dev)) { if (pp->bm_priv) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index 19253a0fb4fef..e91486c48de38 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -1375,7 +1375,7 @@ static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu) }

out_set: - dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); dev->wanted_features = dev->features;

netdev_update_features(dev); diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c index 7c9faa714a10a..549436efc2048 100644 --- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c @@ -1096,7 +1096,7 @@ static int octep_change_mtu(struct net_device *netdev, int new_mtu) true); if (!err) { oct->link_info.mtu = new_mtu; - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); }

return err; diff --git a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c index dd49d0b8b4949..7e6771c9cdbba 100644 --- a/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c +++ b/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c @@ -881,7 +881,7 @@ static int octep_vf_change_mtu(struct net_device *netdev, int new_mtu) err = octep_vf_mbox_set_mtu(oct, new_mtu); if (!err) { oct->link_info.mtu = new_mtu; - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); } return err; } diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c index 14bccff0ee5c7..f5bce3e326cca 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c @@ -67,7 +67,7 @@ static int otx2_change_mtu(struct net_device *netdev, int new_mtu)

netdev_info(netdev, "Changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (if_up) err = otx2_open(netdev); diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c index cf0aa16d75407..99fcc5661674b 100644 --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c @@ -456,7 +456,7 @@ static int otx2vf_change_mtu(struct net_device *netdev, int new_mtu)

netdev_info(netdev, "Changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (if_up) err = otx2vf_open(netdev); diff --git a/drivers/net/ethernet/marvell/prestera/prestera_main.c b/drivers/net/ethernet/marvell/prestera/prestera_main.c index ba6d53ac7f552..63ae01954dfc5 100644 --- a/drivers/net/ethernet/marvell/prestera/prestera_main.c +++ b/drivers/net/ethernet/marvell/prestera/prestera_main.c @@ -489,7 +489,7 @@ static int prestera_port_change_mtu(struct net_device *dev, int mtu) if (err) return err;

- dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu);

return 0; } diff --git a/drivers/net/ethernet/marvell/pxa168_eth.c b/drivers/net/ethernet/marvell/pxa168_eth.c index dd6ca2e4fd517..1a59c952aa01c 100644 --- a/drivers/net/ethernet/marvell/pxa168_eth.c +++ b/drivers/net/ethernet/marvell/pxa168_eth.c @@ -1188,7 +1188,7 @@ static int pxa168_eth_change_mtu(struct net_device *dev, int mtu) { struct pxa168_eth_private *pep = netdev_priv(dev);

- dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); set_port_config_ext(pep);

if (!netif_running(dev)) diff --git a/drivers/net/ethernet/marvell/skge.c b/drivers/net/ethernet/marvell/skge.c index 1b43704baceb5..fcfb34561882b 100644 --- a/drivers/net/ethernet/marvell/skge.c +++ b/drivers/net/ethernet/marvell/skge.c @@ -2905,13 +2905,13 @@ static int skge_change_mtu(struct net_device *dev, int new_mtu) int err;

if (!netif_running(dev)) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

skge_down(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

err = skge_up(dev); if (err) diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index f3f7f4cc27b3a..a7a16eac18913 100644 --- a/drivers/net/ethernet/marvell/sky2.c +++ b/drivers/net/ethernet/marvell/sky2.c @@ -2384,7 +2384,7 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu) u32 imask;

if (!netif_running(dev)) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); netdev_update_features(dev); return 0; } @@ -2407,7 +2407,7 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu) sky2_rx_stop(sky2); sky2_rx_clean(sky2);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); netdev_update_features(dev);

mode = DATA_BLIND_VAL(DATA_BLIND_DEF) | GM_SMOD_VLAN_ENA; diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index d7a96dc11c079..179c0230655a8 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -4055,7 +4055,7 @@ static int mtk_change_mtu(struct net_device *dev, int new_mtu) }

mtk_set_mcr_max_rx(mac, length); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 5d3fde63b2739..4c089cfa027af 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -1649,7 +1649,7 @@ int mlx4_en_start_port(struct net_device *dev) sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);

/* Calculate Rx buf size */ - dev->mtu = min(dev->mtu, priv->max_mtu); + WRITE_ONCE(dev->mtu, min(dev->mtu, priv->max_mtu)); mlx4_en_calc_rx_buf(dev); en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);

@@ -2394,7 +2394,7 @@ static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu) !mlx4_en_check_xdp_mtu(dev, new_mtu)) return -EOPNOTSUPP;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (netif_running(dev)) { mutex_lock(&mdev->state_lock); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 3bd0695845c7d..ffe8919494d55 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -4525,7 +4525,7 @@ int mlx5e_change_mtu(struct net_device *netdev, int new_mtu, err = mlx5e_safe_switch_params(priv, &new_params, preactivate, NULL, reset);

out: - netdev->mtu = params->sw_mtu; + WRITE_ONCE(netdev->mtu, params->sw_mtu); mutex_unlock(&priv->state_lock); return err; } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c index d77be1b4dd9c5..8e0404c0d1ca8 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c @@ -531,7 +531,7 @@ static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu) if (err) goto out;

- netdev->mtu = new_params.sw_mtu; + WRITE_ONCE(netdev->mtu, new_params.sw_mtu);

out: mutex_unlock(&priv->state_lock); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c index f87471306f6b5..028a76944d82d 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib_vlan.c @@ -280,7 +280,7 @@ static int mlx5i_pkey_change_mtu(struct net_device *netdev, int new_mtu) struct mlx5e_priv *priv = mlx5i_epriv(netdev);

mutex_lock(&priv->state_lock); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); mutex_unlock(&priv->state_lock);

return 0; diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index bb642e9bb6cf8..030ed71f945d6 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -825,7 +825,7 @@ static int mlxsw_sp_port_change_mtu(struct net_device *dev, int mtu) err = mlxsw_sp_port_mtu_set(mlxsw_sp_port, mtu); if (err) goto err_port_mtu_set; - dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); return 0;

err_port_mtu_set: diff --git a/drivers/net/ethernet/micrel/ksz884x.c b/drivers/net/ethernet/micrel/ksz884x.c index c5aeeb964c17a..dc1d9f7745658 100644 --- a/drivers/net/ethernet/micrel/ksz884x.c +++ b/drivers/net/ethernet/micrel/ksz884x.c @@ -5427,7 +5427,7 @@ static int netdev_change_mtu(struct net_device *dev, int new_mtu) } hw_mtu = (hw_mtu + 3) & ~3; hw_priv->mtu = hw_mtu; - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index cee47729d022f..6be8a43c908a8 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -3184,7 +3184,7 @@ static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)

ret = lan743x_mac_set_mtu(adapter, new_mtu); if (!ret) - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); return ret; }

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c index b7e75da658340..b12d3b8a64fd3 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c @@ -402,7 +402,7 @@ static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu)

lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(LAN966X_HW_MTU(new_mtu)), lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port)); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (!lan966x->fdma) return 0; diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index f2fae659bf3b2..d087cf954f755 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -690,12 +690,12 @@ static int mana_change_mtu(struct net_device *ndev, int new_mtu) goto out; }

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

err = mana_attach(ndev); if (err) { netdev_err(ndev, "mana_attach failed: %d\n", err); - ndev->mtu = old_mtu; + WRITE_ONCE(ndev->mtu, old_mtu); }

out: diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c index 7b7e1c5b00f47..b7d9657a7af3d 100644 --- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c +++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c @@ -3036,11 +3036,11 @@ static int myri10ge_change_mtu(struct net_device *dev, int new_mtu) /* if we change the mtu on an active device, we must * reset the device so the firmware sees the change */ myri10ge_close(dev); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); myri10ge_open(dev); - } else - dev->mtu = new_mtu; - + } else { + WRITE_ONCE(dev->mtu, new_mtu); + } return 0; }

diff --git a/drivers/net/ethernet/natsemi/natsemi.c b/drivers/net/ethernet/natsemi/natsemi.c index 650a5a1660701..ad0c14849115d 100644 --- a/drivers/net/ethernet/natsemi/natsemi.c +++ b/drivers/net/ethernet/natsemi/natsemi.c @@ -2526,7 +2526,7 @@ static void __set_rx_mode(struct net_device *dev)

static int natsemi_change_mtu(struct net_device *dev, int new_mtu) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

/* synchronized against open : rtnl_lock() held by caller */ if (netif_running(dev)) { diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c index 55408f16fbbc4..f235e76e4ce9a 100644 --- a/drivers/net/ethernet/neterion/s2io.c +++ b/drivers/net/ethernet/neterion/s2io.c @@ -6637,7 +6637,7 @@ static int s2io_change_mtu(struct net_device *dev, int new_mtu) struct s2io_nic *sp = netdev_priv(dev); int ret = 0;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); if (netif_running(dev)) { s2io_stop_all_tx_queue(sp); s2io_card_down(sp); diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 997cc4fcffdbf..182ba0a8b095b 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1526,7 +1526,7 @@ static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp) *dp = nn->dp; nn->dp = new_dp;

- nn->dp.netdev->mtu = new_dp.mtu; + WRITE_ONCE(nn->dp.netdev->mtu, new_dp.mtu);

if (!netif_is_rxfh_configured(nn->dp.netdev)) nfp_net_rss_init_itbl(nn); diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c index 3af1229a3f08d..eee0bfc41074e 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c @@ -177,7 +177,7 @@ static int nfp_repr_change_mtu(struct net_device *netdev, int new_mtu) if (err) return err;

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ethernet/ni/nixge.c b/drivers/net/ethernet/ni/nixge.c index fa1f78b03cb2b..2aa4ad9cf96e8 100644 --- a/drivers/net/ethernet/ni/nixge.c +++ b/drivers/net/ethernet/ni/nixge.c @@ -946,7 +946,7 @@ static int nixge_change_mtu(struct net_device *ndev, int new_mtu) NIXGE_MAX_JUMBO_FRAME_SIZE) return -EINVAL;

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c index 31f896c4aa266..720f577929dbf 100644 --- a/drivers/net/ethernet/nvidia/forcedeth.c +++ b/drivers/net/ethernet/nvidia/forcedeth.c @@ -3098,7 +3098,7 @@ static int nv_change_mtu(struct net_device *dev, int new_mtu) int old_mtu;

old_mtu = dev->mtu; - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

/* return early if the buffer sizes will not change */ if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN) diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c index 28b7cec485ef0..4ac29cd59f2bf 100644 --- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c @@ -2184,7 +2184,7 @@ static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu) } } else { pch_gbe_reset(adapter); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); adapter->hw.mac.max_frame_size = max_frame; }

diff --git a/drivers/net/ethernet/pasemi/pasemi_mac.c b/drivers/net/ethernet/pasemi/pasemi_mac.c index ed7dd0a042355..62ba269da9026 100644 --- a/drivers/net/ethernet/pasemi/pasemi_mac.c +++ b/drivers/net/ethernet/pasemi/pasemi_mac.c @@ -1639,7 +1639,7 @@ static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu) reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4); write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */ mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 7f0c6cdc375e3..24870da3f4848 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -1761,13 +1761,13 @@ static int ionic_change_mtu(struct net_device *netdev, int new_mtu)

/* if we're not running, nothing more to do */ if (!netif_running(netdev)) { - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); return 0; }

mutex_lock(&lif->queue_lock); ionic_stop_queues_reconfig(lif); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); err = ionic_start_queues_reconfig(lif); mutex_unlock(&lif->queue_lock);

diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c index 6e12cd21ac906..89c8b23496942 100644 --- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c +++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c @@ -960,7 +960,7 @@ int netxen_nic_change_mtu(struct net_device *netdev, int mtu) rc = adapter->set_mtu(adapter, mtu);

if (!rc) - netdev->mtu = mtu; + WRITE_ONCE(netdev->mtu, mtu);

return rc; } diff --git a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c index ae3ebf0cf9990..f497f6ca10188 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_ethtool.c +++ b/drivers/net/ethernet/qlogic/qede/qede_ethtool.c @@ -1026,7 +1026,7 @@ static int qede_get_regs_len(struct net_device *ndev) static void qede_update_mtu(struct qede_dev *edev, struct qede_reload_args *args) { - edev->ndev->mtu = args->u.mtu; + WRITE_ONCE(edev->ndev->mtu, args->u.mtu); }

/* Netdevice NDOs */ diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c index 4b8bc46f55c29..ae4ee0326ee15 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c @@ -1015,7 +1015,7 @@ int qlcnic_change_mtu(struct net_device *netdev, int mtu) rc = qlcnic_fw_cmd_set_mtu(adapter, mtu);

if (!rc) - netdev->mtu = mtu; + WRITE_ONCE(netdev->mtu, mtu);

return rc; } diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c index 4c06f55878de9..99d4647bf245d 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac.c @@ -216,7 +216,7 @@ static int emac_change_mtu(struct net_device *netdev, int new_mtu) netif_dbg(adpt, hw, adpt->netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (netif_running(netdev)) return emac_reinit_locked(adpt); diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c index 9d2a9562c96ff..f1e40aade127b 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c @@ -90,7 +90,7 @@ static int rmnet_vnd_change_mtu(struct net_device *rmnet_dev, int new_mtu) new_mtu > (priv->real_dev->mtu - headroom)) return -EINVAL;

- rmnet_dev->mtu = new_mtu; + WRITE_ONCE(rmnet_dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c index f5786d78ed230..5652da8a178c0 100644 --- a/drivers/net/ethernet/realtek/8139cp.c +++ b/drivers/net/ethernet/realtek/8139cp.c @@ -1277,14 +1277,14 @@ static int cp_change_mtu(struct net_device *dev, int new_mtu)

/* if network interface not up, no need for complexity */ if (!netif_running(dev)) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); cp_set_rxbufsize(cp); /* set new rx buf size */ return 0; }

/* network IS up, close it, reset MTU, and come up again. */ cp_close(dev); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); cp_set_rxbufsize(cp); return cp_open(dev); } diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index fab21d2bc4ffa..5abbea91bc07e 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -3924,7 +3924,7 @@ static int rtl8169_change_mtu(struct net_device *dev, int new_mtu) { struct rtl8169_private *tp = netdev_priv(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); netdev_update_features(dev); rtl_jumbo_config(tp); rtl_set_eee_txidle_timer(tp); diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 384ddad65aaf6..4d100283c30fb 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2423,7 +2423,7 @@ static int ravb_change_mtu(struct net_device *ndev, int new_mtu) { struct ravb_private *priv = netdev_priv(ndev);

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

if (netif_running(ndev)) { synchronize_irq(priv->emac_irq); diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 0786eb0da3914..7a25903e35c30 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -2624,7 +2624,7 @@ static int sh_eth_change_mtu(struct net_device *ndev, int new_mtu) if (netif_running(ndev)) return -EBUSY;

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu); netdev_update_features(ndev);

return 0; diff --git a/drivers/net/ethernet/rocker/rocker_main.c b/drivers/net/ethernet/rocker/rocker_main.c index 755db89db9099..e097ce3e69ea3 100644 --- a/drivers/net/ethernet/rocker/rocker_main.c +++ b/drivers/net/ethernet/rocker/rocker_main.c @@ -1967,7 +1967,7 @@ static int rocker_port_change_mtu(struct net_device *dev, int new_mtu) rocker_port_stop(dev);

netdev_info(dev, "MTU change from %d to %d\n", dev->mtu, new_mtu); - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

err = rocker_cmd_set_port_settings_mtu(rocker_port, new_mtu); if (err) diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c index ecbe3994f2b1b..12c8396b6942d 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c @@ -1804,7 +1804,7 @@ static int sxgbe_set_features(struct net_device *dev, */ static int sxgbe_change_mtu(struct net_device *dev, int new_mtu) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (!netif_running(dev)) return 0; diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c index 551f890db90a6..4ebd5ae23ecae 100644 --- a/drivers/net/ethernet/sfc/efx_common.c +++ b/drivers/net/ethernet/sfc/efx_common.c @@ -302,7 +302,7 @@ int efx_change_mtu(struct net_device *net_dev, int new_mtu) efx_stop_all(efx);

mutex_lock(&efx->mac_lock); - net_dev->mtu = new_mtu; + WRITE_ONCE(net_dev->mtu, new_mtu); efx_mac_reconfigure(efx, true); mutex_unlock(&efx->mac_lock);

diff --git a/drivers/net/ethernet/sfc/falcon/efx.c b/drivers/net/ethernet/sfc/falcon/efx.c index 1cb32aedd89c7..8925745f1c17f 100644 --- a/drivers/net/ethernet/sfc/falcon/efx.c +++ b/drivers/net/ethernet/sfc/falcon/efx.c @@ -2125,7 +2125,7 @@ static int ef4_change_mtu(struct net_device *net_dev, int new_mtu) ef4_stop_all(efx);

mutex_lock(&efx->mac_lock); - net_dev->mtu = new_mtu; + WRITE_ONCE(net_dev->mtu, new_mtu); ef4_mac_reconfigure(efx); mutex_unlock(&efx->mac_lock);

diff --git a/drivers/net/ethernet/sfc/siena/efx_common.c b/drivers/net/ethernet/sfc/siena/efx_common.c index 88e5bc347a44c..cf195162e2708 100644 --- a/drivers/net/ethernet/sfc/siena/efx_common.c +++ b/drivers/net/ethernet/sfc/siena/efx_common.c @@ -306,7 +306,7 @@ int efx_siena_change_mtu(struct net_device *net_dev, int new_mtu) efx_siena_stop_all(efx);

mutex_lock(&efx->mac_lock); - net_dev->mtu = new_mtu; + WRITE_ONCE(net_dev->mtu, new_mtu); efx_siena_mac_reconfigure(efx, true); mutex_unlock(&efx->mac_lock);

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 59bf83904b62d..3d828904db0d3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -5909,7 +5909,7 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu) stmmac_set_rx_mode(dev); }

- dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); netdev_update_features(dev);

return 0; diff --git a/drivers/net/ethernet/sun/cassini.c b/drivers/net/ethernet/sun/cassini.c index 8f1f43dbb76dc..b8948d5b779af 100644 --- a/drivers/net/ethernet/sun/cassini.c +++ b/drivers/net/ethernet/sun/cassini.c @@ -3804,7 +3804,7 @@ static int cas_change_mtu(struct net_device *dev, int new_mtu) { struct cas *cp = netdev_priv(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); if (!netif_running(dev) || !netif_device_present(dev)) return 0;

diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c index f68aa813d4fb1..41a27ae58cedf 100644 --- a/drivers/net/ethernet/sun/niu.c +++ b/drivers/net/ethernet/sun/niu.c @@ -6751,7 +6751,7 @@ static int niu_change_mtu(struct net_device *dev, int new_mtu) orig_jumbo = (dev->mtu > ETH_DATA_LEN); new_jumbo = (new_mtu > ETH_DATA_LEN);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (!netif_running(dev) || (orig_jumbo == new_jumbo)) diff --git a/drivers/net/ethernet/sun/sungem.c b/drivers/net/ethernet/sun/sungem.c index 9bd1df8308d24..4aa356e2f2993 100644 --- a/drivers/net/ethernet/sun/sungem.c +++ b/drivers/net/ethernet/sun/sungem.c @@ -2499,7 +2499,7 @@ static int gem_change_mtu(struct net_device *dev, int new_mtu) { struct gem *gp = netdev_priv(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

/* We'll just catch it later when the device is up'd or resumed */ if (!netif_running(dev) || !netif_device_present(dev)) diff --git a/drivers/net/ethernet/synopsys/dwc-xlgmac-net.c b/drivers/net/ethernet/synopsys/dwc-xlgmac-net.c index 36b948820c1e5..d1793b6154c75 100644 --- a/drivers/net/ethernet/synopsys/dwc-xlgmac-net.c +++ b/drivers/net/ethernet/synopsys/dwc-xlgmac-net.c @@ -823,7 +823,7 @@ static int xlgmac_change_mtu(struct net_device *netdev, int mtu) return ret;

pdata->rx_buf_size = ret; - netdev->mtu = mtu; + WRITE_ONCE(netdev->mtu, mtu);

xlgmac_restart_dev(pdata);

diff --git a/drivers/net/ethernet/tehuti/tehuti.c b/drivers/net/ethernet/tehuti/tehuti.c index ca409515ead5a..ede5f7890fb4b 100644 --- a/drivers/net/ethernet/tehuti/tehuti.c +++ b/drivers/net/ethernet/tehuti/tehuti.c @@ -756,7 +756,7 @@ static int bdx_change_mtu(struct net_device *ndev, int new_mtu) { ENTER;

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu); if (netif_running(ndev)) { bdx_close(ndev); bdx_open(ndev); diff --git a/drivers/net/ethernet/via/via-velocity.c b/drivers/net/ethernet/via/via-velocity.c index 1c6b2a9bba081..55fff4d0d3801 100644 --- a/drivers/net/ethernet/via/via-velocity.c +++ b/drivers/net/ethernet/via/via-velocity.c @@ -2294,7 +2294,7 @@ static int velocity_change_mtu(struct net_device *dev, int new_mtu) int ret = 0;

if (!netif_running(dev)) { - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); goto out_0; }

@@ -2336,7 +2336,7 @@ static int velocity_change_mtu(struct net_device *dev, int new_mtu) tmp_vptr->rx = rx; tmp_vptr->tx = tx;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

velocity_init_registers(vptr, VELOCITY_INIT_COLD);

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c index 945c13d1a9829..3662483bfe2e7 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c +++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c @@ -1408,7 +1408,7 @@ int wx_change_mtu(struct net_device *netdev, int new_mtu) { struct wx *wx = netdev_priv(netdev);

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu); wx_set_rx_buffer_len(wx);

return 0; diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index aaf780fd4f5e7..c29809cd92015 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -1641,7 +1641,7 @@ static int axienet_change_mtu(struct net_device *ndev, int new_mtu) XAE_TRL_SIZE) > lp->rxmem) return -EINVAL;

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c index e0d26148dfd95..8aff6a73ca0a2 100644 --- a/drivers/net/ethernet/xscale/ixp4xx_eth.c +++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c @@ -1233,7 +1233,7 @@ static int ixp4xx_eth_change_mtu(struct net_device *dev, int new_mtu) return ret; }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c index 5fbe33a09bb0b..6411da359e5aa 100644 --- a/drivers/net/fjes/fjes_main.c +++ b/drivers/net/fjes/fjes_main.c @@ -811,7 +811,7 @@ static int fjes_change_mtu(struct net_device *netdev, int new_mtu) netif_tx_stop_all_queues(netdev); }

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

if (running) { for (epidx = 0; epidx < hw->max_epid; epidx++) { diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index f918ca6146c82..51495cb4b9be4 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -1059,7 +1059,7 @@ static int geneve_change_mtu(struct net_device *dev, int new_mtu) else if (new_mtu < dev->min_mtu) new_mtu = dev->min_mtu;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 11831a1c97623..44142245343d9 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -1233,14 +1233,14 @@ static int netvsc_change_mtu(struct net_device *ndev, int mtu) if (ret) goto rollback_vf;

- ndev->mtu = mtu; + WRITE_ONCE(ndev->mtu, mtu);

ret = netvsc_attach(ndev, device_info); if (!ret) goto out;

/* Attempt rollback to original MTU */ - ndev->mtu = orig_mtu; + WRITE_ONCE(ndev->mtu, orig_mtu);

if (netvsc_attach(ndev, device_info)) netdev_err(ndev, "restoring mtu failed\n"); diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index ff016c11b4a03..2da70bc3dd869 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -3753,7 +3753,7 @@ static int macsec_change_mtu(struct net_device *dev, int new_mtu) if (macsec->real_dev->mtu - extra < new_mtu) return -ERANGE;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 0cec2783a3e71..67b7ef2d463fa 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -865,7 +865,7 @@ static int macvlan_change_mtu(struct net_device *dev, int new_mtu)

if (vlan->lowerdev->mtu < new_mtu) return -EINVAL; - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/net_failover.c b/drivers/net/net_failover.c index d0c916a53d7ce..963d8b4af28d7 100644 --- a/drivers/net/net_failover.c +++ b/drivers/net/net_failover.c @@ -231,7 +231,7 @@ static int net_failover_change_mtu(struct net_device *dev, int new_mtu) } }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c index d127856f8f366..e3a385a322695 100644 --- a/drivers/net/netdevsim/netdev.c +++ b/drivers/net/netdevsim/netdev.c @@ -74,7 +74,7 @@ static int nsim_change_mtu(struct net_device *dev, int new_mtu) if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU) return -EBUSY;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/drivers/net/ntb_netdev.c b/drivers/net/ntb_netdev.c index 536bd6564f8b8..ffe7f463e16ee 100644 --- a/drivers/net/ntb_netdev.c +++ b/drivers/net/ntb_netdev.c @@ -306,7 +306,7 @@ static int ntb_netdev_change_mtu(struct net_device *ndev, int new_mtu) return -EINVAL;

if (!netif_running(ndev)) { - ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu); return 0; }

@@ -335,7 +335,7 @@ static int ntb_netdev_change_mtu(struct net_device *ndev, int new_mtu) } }

- ndev->mtu = new_mtu; + WRITE_ONCE(ndev->mtu, new_mtu);

ntb_transport_link_up(dev->qp);

diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c index 0aba3569ccc0d..fb362ee248ff2 100644 --- a/drivers/net/slip/slip.c +++ b/drivers/net/slip/slip.c @@ -286,7 +286,7 @@ static int sl_realloc_bufs(struct slip *sl, int mtu) } } sl->mtu = mtu; - dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); sl->buffsize = len; err = 0;

diff --git a/drivers/net/team/team_core.c b/drivers/net/team/team_core.c index 8c7dbaf7c22eb..ab1935a4aa2cd 100644 --- a/drivers/net/team/team_core.c +++ b/drivers/net/team/team_core.c @@ -1831,7 +1831,7 @@ static int team_change_mtu(struct net_device *dev, int new_mtu) team->port_mtu_change_allowed = false; mutex_unlock(&team->lock);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0;

diff --git a/drivers/net/usb/aqc111.c b/drivers/net/usb/aqc111.c index 7b8afa589a53c..74571c8e76919 100644 --- a/drivers/net/usb/aqc111.c +++ b/drivers/net/usb/aqc111.c @@ -424,7 +424,7 @@ static int aqc111_change_mtu(struct net_device *net, int new_mtu) u16 reg16 = 0; u8 buf[5];

- net->mtu = new_mtu; + WRITE_ONCE(net->mtu, new_mtu); dev->hard_mtu = net->mtu + net->hard_header_len;

aqc111_read16_cmd(dev, AQ_ACCESS_MAC, SFR_MEDIUM_STATUS_MODE, diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c index f7cff58fe0449..57d6e5abc30e8 100644 --- a/drivers/net/usb/asix_devices.c +++ b/drivers/net/usb/asix_devices.c @@ -1230,7 +1230,7 @@ static int ax88178_change_mtu(struct net_device *net, int new_mtu) if ((ll_mtu % dev->maxpacket) == 0) return -EDOM;

- net->mtu = new_mtu; + WRITE_ONCE(net->mtu, new_mtu); dev->hard_mtu = net->mtu + net->hard_header_len; ax88178_set_mfb(dev);

diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c index b25535aa15ae3..c5196b5313c0b 100644 --- a/drivers/net/usb/ax88179_178a.c +++ b/drivers/net/usb/ax88179_178a.c @@ -943,7 +943,7 @@ static int ax88179_change_mtu(struct net_device *net, int new_mtu) struct usbnet *dev = netdev_priv(net); u16 tmp16;

- net->mtu = new_mtu; + WRITE_ONCE(net->mtu, new_mtu); dev->hard_mtu = net->mtu + net->hard_header_len;

if (net->mtu > 1500) { diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index db05622f1f703..bf76ecccc2e6a 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -798,7 +798,7 @@ int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) { struct usbnet *dev = netdev_priv(net);

- net->mtu = new_mtu; + WRITE_ONCE(net->mtu, new_mtu); cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev));

return 0; diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 0030be502daa4..5a2c38b63012c 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2528,7 +2528,7 @@ static int lan78xx_change_mtu(struct net_device *netdev, int new_mtu)

ret = lan78xx_set_rx_max_frame_length(dev, max_frame_len); if (!ret) - netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

usb_autopm_put_interface(dev->intf);

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 51e9f5b2dccff..19df1cd9f0724 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -9365,7 +9365,7 @@ static int rtl8152_change_mtu(struct net_device *dev, int new_mtu) case RTL_VER_01: case RTL_VER_02: case RTL_VER_07: - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; default: break; @@ -9377,7 +9377,7 @@ static int rtl8152_change_mtu(struct net_device *dev, int new_mtu)

mutex_lock(&tp->control);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

if (netif_running(dev)) { if (tp->rtl_ops.change_mtu) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index f3f7f686fe9ce..9fd516e8bb107 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -398,7 +398,7 @@ int usbnet_change_mtu (struct net_device *net, int new_mtu) // no second zero-length packet read wanted after mtu-sized packets if ((ll_mtu % dev->maxpacket) == 0) return -EDOM; - net->mtu = new_mtu; + WRITE_ONCE(net->mtu, new_mtu);

dev->hard_mtu = net->mtu + net->hard_header_len; if (dev->rx_urb_size == old_hard_mtu) { diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c index 0578864792b60..89ca6e75fcc6b 100644 --- a/drivers/net/vmxnet3/vmxnet3_drv.c +++ b/drivers/net/vmxnet3/vmxnet3_drv.c @@ -3457,7 +3457,7 @@ vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) struct vmxnet3_adapter *adapter = netdev_priv(netdev); int err = 0;

- netdev->mtu = new_mtu; + WRITE_ONCE(netdev->mtu, new_mtu);

/* * Reset_work may be in the middle of resetting the device, wait for its diff --git a/drivers/net/vsockmon.c b/drivers/net/vsockmon.c index a1ba5169ed5db..4c260074c091f 100644 --- a/drivers/net/vsockmon.c +++ b/drivers/net/vsockmon.c @@ -58,7 +58,7 @@ static int vsockmon_change_mtu(struct net_device *dev, int new_mtu) if (!vsockmon_is_valid_mtu(new_mtu)) return -EINVAL;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c index 7e3a7d1f20181..f78dd0438843b 100644 --- a/drivers/net/vxlan/vxlan_core.c +++ b/drivers/net/vxlan/vxlan_core.c @@ -3181,7 +3181,7 @@ static int vxlan_change_mtu(struct net_device *dev, int new_mtu) return -EINVAL; }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index 65db5f14465f3..325fcb3d10759 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -358,7 +358,7 @@ static int xenvif_change_mtu(struct net_device *dev, int mtu)

if (mtu > max) return -EINVAL; - dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); return 0; }

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index 8d2aee88526c6..4265c1cd0ff71 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1376,7 +1376,7 @@ static int xennet_change_mtu(struct net_device *dev, int mtu)

if (mtu > max) return -EINVAL; - dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); return 0; }

diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c index 878fe3ce53ada..b93c2eb45916d 100644 --- a/drivers/s390/net/ctcm_main.c +++ b/drivers/s390/net/ctcm_main.c @@ -996,7 +996,7 @@ static int ctcm_change_mtu(struct net_device *dev, int new_mtu) return -EINVAL; dev->hard_header_len = LL_HEADER_LENGTH + 2; } - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 39876eff51d21..3efba4f857ac6 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -149,7 +149,7 @@ static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) if (max_mtu < new_mtu) return -ERANGE;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 89c51b3cf4307..30ecbc2ef1fd9 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -159,7 +159,7 @@ static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) if (new_mtu < ETH_MIN_MTU || new_mtu > batadv_hardif_min_mtu(dev)) return -EINVAL;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); bat_priv->mtu_set_by_user = new_mtu;

return 0; diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index ab4d33e020142..71b50001ca588 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -197,7 +197,7 @@ static int br_change_mtu(struct net_device *dev, int new_mtu) { struct net_bridge *br = netdev_priv(dev);

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

/* this flag will be cleared if the MTU was automatically adjusted */ br_opt_toggle(br, BROPT_MTU_SET_BY_USER, true); diff --git a/net/dsa/user.c b/net/dsa/user.c index c94b868855aa1..1f7b8f21db9e4 100644 --- a/net/dsa/user.c +++ b/net/dsa/user.c @@ -2120,7 +2120,7 @@ int dsa_user_change_mtu(struct net_device *dev, int new_mtu) if (err) goto out_port_failed;

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

dsa_bridge_mtu_normalization(dp);

diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index 86127300b102f..26d5282a64960 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -123,7 +123,7 @@ static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu) return -EINVAL; }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu);

return 0; } diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c index 9756e657bab97..d7ae32473c41a 100644 --- a/net/hsr/hsr_main.c +++ b/net/hsr/hsr_main.c @@ -96,7 +96,7 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event, break; /* Handled in ndo_change_mtu() */ mtu_max = hsr_get_max_mtu(port->hsr); master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER); - master->dev->mtu = mtu_max; + WRITE_ONCE(master->dev->mtu, mtu_max); break; case NETDEV_UNREGISTER: if (!is_hsr_master(dev)) { diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index c3af965dc4078..ba205473522e4 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -793,7 +793,7 @@ static void ipgre_link_update(struct net_device *dev, bool set_mtu) dev->needed_headroom += len;

if (set_mtu) - dev->mtu = max_t(int, dev->mtu - len, 68); + WRITE_ONCE(dev->mtu, max_t(int, dev->mtu - len, 68));

if (test_bit(IP_TUNNEL_SEQ_BIT, tunnel->parms.o_flags) || (test_bit(IP_TUNNEL_CSUM_BIT, tunnel->parms.o_flags) && diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index f1c5f6c3f2f82..bccef2fcf6207 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -897,7 +897,7 @@ static void ip_tunnel_update(struct ip_tunnel_net *itn, t->fwmark = fwmark; mtu = ip_tunnel_bind_dev(dev); if (set_mtu) - dev->mtu = mtu; + WRITE_ONCE(dev->mtu, mtu); } dst_cache_reset(&t->dst_cache); netdev_state_change(dev); @@ -1082,7 +1082,7 @@ int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict) new_mtu = max_mtu; }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; } EXPORT_SYMBOL_GPL(__ip_tunnel_change_mtu); diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 5aec79c2af1a5..9dee0c1279554 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1746,7 +1746,7 @@ int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu) if (new_mtu > IP_MAX_MTU - dev->hard_header_len) return -EINVAL; } - dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; } EXPORT_SYMBOL(ip6_tnl_change_mtu); diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c index 78344cf3867ea..590737c275379 100644 --- a/net/ipv6/ip6_vti.c +++ b/net/ipv6/ip6_vti.c @@ -666,7 +666,8 @@ static void vti6_link_config(struct ip6_tnl *t, bool keep_mtu) dev->flags &= ~IFF_POINTOPOINT;

if (keep_mtu && dev->mtu) { - dev->mtu = clamp(dev->mtu, dev->min_mtu, dev->max_mtu); + WRITE_ONCE(dev->mtu, + clamp(dev->mtu, dev->min_mtu, dev->max_mtu)); return; }

diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c index 29850d0f07330..8badec6d82a24 100644 --- a/net/sched/sch_teql.c +++ b/net/sched/sch_teql.c @@ -424,7 +424,7 @@ static int teql_master_mtu(struct net_device *dev, int new_mtu) } while ((q = NEXT_SLAVE(q)) != m->slaves); }

- dev->mtu = new_mtu; + WRITE_ONCE(dev->mtu, new_mtu); return 0; }