The following commit has been merged in the master branch: commit 4a7c972644c1151f6dd34ff4b5f7eacb239e22ee Author: Tobias Klauser tklauser@distanz.ch Date: Wed Jan 18 17:45:01 2017 +0100

net: Remove usage of net_device last_rx member

The network stack no longer uses the last_rx member of struct net_device since the bonding driver switched to use its own private last_rx in commit 9f242738376d ("bonding: use last_arp_rx in slave_last_rx()").

However, some drivers still (ab)use the field for their own purposes and some driver just update it without actually using it.

Previously, there was an accompanying comment for the last_rx member added in commit 4dc89133f49b ("net: add a comment on netdev->last_rx") which asked drivers not to update is, unless really needed. However, this commend was removed in commit f8ff080dacec ("bonding: remove useless updating of slave->dev->last_rx"), so some drivers added later on still did update last_rx.

Remove all usage of last_rx and switch three drivers (sky2, atp and smc91c92_cs) which actually read and write it to use their own private copy in netdev_priv.

Compile-tested with allyesconfig and allmodconfig on x86 and arm.

Cc: Eric Dumazet eric.dumazet@gmail.com Cc: Jay Vosburgh j.vosburgh@gmail.com Cc: Veaceslav Falico vfalico@gmail.com Cc: Andy Gospodarek andy@greyhouse.net Cc: Mirko Lindner mlindner@marvell.com Cc: Stephen Hemminger stephen@networkplumber.org Signed-off-by: Tobias Klauser tklauser@distanz.ch Acked-by: Eric Dumazet edumazet@google.com Reviewed-by: Jay Vosburgh jay.vosburgh@canonical.com Signed-off-by: David S. Miller davem@davemloft.net

diff --git a/arch/m68k/emu/nfeth.c b/arch/m68k/emu/nfeth.c index fc4be02..e45ce42 100644 --- a/arch/m68k/emu/nfeth.c +++ b/arch/m68k/emu/nfeth.c @@ -124,7 +124,6 @@ static inline void recv_packet(struct net_device *dev)

skb->protocol = eth_type_trans(skb, dev); netif_rx(skb); - dev->last_rx = jiffies; dev->stats.rx_packets++; dev->stats.rx_bytes += pktlen;

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c index 2b89ec2..5ee3f00 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_main.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c @@ -2360,7 +2360,6 @@ liquidio_push_packet(u32 octeon_id __attribute__((unused)), if (packet_was_received) { droq->stats.rx_bytes_received += len; droq->stats.rx_pkts_received++; - netdev->last_rx = jiffies; } else { droq->stats.rx_dropped++; netif_info(lio, rx_err, lio->netdev, diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c index 19d88fb..e96cf6c 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c @@ -1571,7 +1571,6 @@ liquidio_push_packet(u32 octeon_id __attribute__((unused)), if (packet_was_received) { droq->stats.rx_bytes_received += len; droq->stats.rx_pkts_received++; - netdev->last_rx = jiffies; } else { droq->stats.rx_dropped++; netif_info(lio, rx_err, lio->netdev, diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index b7cb613..f7b75e9 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -797,7 +797,6 @@ static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,

skb->protocol = eth_type_trans(skb, ndev); (void)napi_gro_receive(&ring_data->napi, skb); - ndev->last_rx = jiffies; }

static int hns_desc_unused(struct hnae_ring *ring) diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 79651eb..2175cce 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -240,9 +240,9 @@ static void e1000e_dump(struct e1000_adapter *adapter) /* Print netdevice Info */ if (netdev) { dev_info(&adapter->pdev->dev, "Net device Info\n"); - pr_info("Device Name state trans_start last_rx\n"); - pr_info("%-15s %016lX %016lX %016lX\n", netdev->name, - netdev->state, dev_trans_start(netdev), netdev->last_rx); + pr_info("Device Name state trans_start\n"); + pr_info("%-15s %016lX %016lX\n", netdev->name, + netdev->state, dev_trans_start(netdev)); }

/* Print Registers */ diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 7fc9549..be456ba 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -383,9 +383,9 @@ static void igb_dump(struct igb_adapter *adapter) /* Print netdevice Info */ if (netdev) { dev_info(&adapter->pdev->dev, "Net device Info\n"); - pr_info("Device Name state trans_start last_rx\n"); - pr_info("%-15s %016lX %016lX %016lX\n", netdev->name, - netdev->state, dev_trans_start(netdev), netdev->last_rx); + pr_info("Device Name state trans_start\n"); + pr_info("%-15s %016lX %016lX\n", netdev->name, + netdev->state, dev_trans_start(netdev)); }

/* Print Registers */ diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index ffe7d94..3b3b52b 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -611,12 +611,11 @@ static void ixgbe_dump(struct ixgbe_adapter *adapter) if (netdev) { dev_info(&adapter->pdev->dev, "Net device Info\n"); pr_info("Device Name state " - "trans_start last_rx\n"); - pr_info("%-15s %016lX %016lX %016lX\n", + "trans_start\n"); + pr_info("%-15s %016lX %016lX\n", netdev->name, netdev->state, - dev_trans_start(netdev), - netdev->last_rx); + dev_trans_start(netdev)); }

/* Print Registers */ diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index be003c5..2b2cc3f 100644 --- a/drivers/net/ethernet/marvell/sky2.c +++ b/drivers/net/ethernet/marvell/sky2.c @@ -2666,7 +2666,7 @@ static inline void sky2_rx_done(struct sky2_hw *hw, unsigned port, sky2->rx_stats.bytes += bytes; u64_stats_update_end(&sky2->rx_stats.syncp);

- dev->last_rx = jiffies; + sky2->last_rx = jiffies; sky2_rx_update(netdev_priv(dev), rxqaddr[port]); }

@@ -2953,7 +2953,7 @@ static int sky2_rx_hung(struct net_device *dev) u8 fifo_lev = sky2_read8(hw, Q_ADDR(rxq, Q_RL));

/* If idle and MAC or PCI is stuck */ - if (sky2->check.last == dev->last_rx && + if (sky2->check.last == sky2->last_rx && ((mac_rp == sky2->check.mac_rp && mac_lev != 0 && mac_lev >= sky2->check.mac_lev) || /* Check if the PCI RX hang */ @@ -2965,7 +2965,7 @@ static int sky2_rx_hung(struct net_device *dev) fifo_rp, sky2_read8(hw, Q_ADDR(rxq, Q_WP))); return 1; } else { - sky2->check.last = dev->last_rx; + sky2->check.last = sky2->last_rx; sky2->check.mac_rp = mac_rp; sky2->check.mac_lev = mac_lev; sky2->check.fifo_rp = fifo_rp; diff --git a/drivers/net/ethernet/marvell/sky2.h b/drivers/net/ethernet/marvell/sky2.h index ec6dcd8..0fe1607 100644 --- a/drivers/net/ethernet/marvell/sky2.h +++ b/drivers/net/ethernet/marvell/sky2.h @@ -2247,6 +2247,7 @@ struct sky2_port { u16 rx_data_size; u16 rx_nfrags;

+ unsigned long last_rx; struct { unsigned long last; u32 mac_rp; diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c index 0b4deb3..d297ed9 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c @@ -1213,7 +1213,6 @@ void emac_mac_rx_process(struct emac_adapter *adpt, struct emac_rx_queue *rx_q, emac_receive_skb(rx_q, skb, (u16)RRD_CVALN_TAG(&rrd), (bool)RRD_CVTAG(&rrd));

- netdev->last_rx = jiffies; (*num_pkts)++; } while (*num_pkts < max_pkts);

diff --git a/drivers/net/ethernet/realtek/atp.c b/drivers/net/ethernet/realtek/atp.c index 570ed3b..9bcd4ae 100644 --- a/drivers/net/ethernet/realtek/atp.c +++ b/drivers/net/ethernet/realtek/atp.c @@ -170,7 +170,7 @@ struct net_local { spinlock_t lock; struct net_device *next_module; struct timer_list timer; /* Media selection timer. */ - long last_rx_time; /* Last Rx, in jiffies, to handle Rx hang. */ + unsigned long last_rx_time; /* Last Rx, in jiffies, to handle Rx hang. */ int saved_tx_size; unsigned int tx_unit_busy:1; unsigned char re_tx, /* Number of packet retransmissions. */ @@ -668,11 +668,11 @@ static irqreturn_t atp_interrupt(int irq, void *dev_instance) } num_tx_since_rx++; } else if (num_tx_since_rx > 8 && - time_after(jiffies, dev->last_rx + HZ)) { + time_after(jiffies, lp->last_rx_time + HZ)) { if (net_debug > 2) printk(KERN_DEBUG "%s: Missed packet? No Rx after %d Tx and " "%ld jiffies status %02x CMR1 %02x.\n", dev->name, - num_tx_since_rx, jiffies - dev->last_rx, status, + num_tx_since_rx, jiffies - lp->last_rx_time, status, (read_nibble(ioaddr, CMR1) >> 3) & 15); dev->stats.rx_missed_errors++; hardware_init(dev); @@ -789,7 +789,6 @@ static void net_rx(struct net_device *dev) read_block(ioaddr, pkt_len, skb_put(skb,pkt_len), dev->if_port); skb->protocol = eth_type_trans(skb, dev); netif_rx(skb); - dev->last_rx = jiffies; dev->stats.rx_packets++; dev->stats.rx_bytes += pkt_len; } diff --git a/drivers/net/ethernet/smsc/smc91c92_cs.c b/drivers/net/ethernet/smsc/smc91c92_cs.c index 6715462..97280da 100644 --- a/drivers/net/ethernet/smsc/smc91c92_cs.c +++ b/drivers/net/ethernet/smsc/smc91c92_cs.c @@ -113,6 +113,7 @@ struct smc_private { struct mii_if_info mii_if; int duplex; int rx_ovrn; + unsigned long last_rx; };

/* Special definitions for Megahertz multifunction cards */ @@ -1491,6 +1492,7 @@ static void smc_rx(struct net_device *dev) if (!(rx_status & RS_ERRORS)) { /* do stuff to make a new packet */ struct sk_buff *skb; + struct smc_private *smc = netdev_priv(dev); /* Note: packet_length adds 5 or 6 extra bytes here! */ skb = netdev_alloc_skb(dev, packet_length+2); @@ -1509,7 +1511,7 @@ static void smc_rx(struct net_device *dev) skb->protocol = eth_type_trans(skb, dev); netif_rx(skb); - dev->last_rx = jiffies; + smc->last_rx = jiffies; dev->stats.rx_packets++; dev->stats.rx_bytes += packet_length; if (rx_status & RS_MULTICAST) @@ -1790,7 +1792,7 @@ static void media_check(u_long arg) }

/* Ignore collisions unless we've had no rx's recently */ - if (time_after(jiffies, dev->last_rx + HZ)) { + if (time_after(jiffies, smc->last_rx + HZ)) { if (smc->tx_err || (smc->media_status & EPH_16COL)) media |= EPH_16COL; } diff --git a/drivers/net/irda/bfin_sir.c b/drivers/net/irda/bfin_sir.c index be5bb0b..3151b58 100644 --- a/drivers/net/irda/bfin_sir.c +++ b/drivers/net/irda/bfin_sir.c @@ -22,7 +22,7 @@ static int max_rate = 57600; static int max_rate = 115200; #endif

-static void turnaround_delay(unsigned long last_jif, int mtt) +static void turnaround_delay(int mtt) { long ticks;

@@ -209,7 +209,6 @@ static void bfin_sir_rx_chars(struct net_device *dev) UART_CLEAR_LSR(port); ch = UART_GET_CHAR(port); async_unwrap_char(dev, &self->stats, &self->rx_buff, ch); - dev->last_rx = jiffies; }

static irqreturn_t bfin_sir_rx_int(int irq, void *dev_id) @@ -510,7 +509,7 @@ static void bfin_sir_send_work(struct work_struct *work) int tx_cnt = 10;

while (bfin_sir_is_receiving(dev) && --tx_cnt) - turnaround_delay(dev->last_rx, self->mtt); + turnaround_delay(self->mtt);

bfin_sir_stop_rx(port);

diff --git a/drivers/net/irda/sh_sir.c b/drivers/net/irda/sh_sir.c index e3fe9a2..fede686 100644 --- a/drivers/net/irda/sh_sir.c +++ b/drivers/net/irda/sh_sir.c @@ -547,7 +547,6 @@ static void sh_sir_rx(struct sh_sir_self *self)

async_unwrap_char(self->ndev, &self->ndev->stats, &self->rx_buff, (u8)data); - self->ndev->last_rx = jiffies;

if (EOFD & sh_sir_read(self, IRIF_SIR_FRM)) continue; diff --git a/drivers/staging/ks7010/ks_hostif.c b/drivers/staging/ks7010/ks_hostif.c index 1fbd495..c7652c3 100644 --- a/drivers/staging/ks7010/ks_hostif.c +++ b/drivers/staging/ks7010/ks_hostif.c @@ -461,7 +461,6 @@ void hostif_data_indication(struct ks_wlan_private *priv) skb->protocol = eth_type_trans(skb, skb->dev); priv->nstats.rx_packets++; priv->nstats.rx_bytes += rx_ind_size; - skb->dev->last_rx = jiffies; netif_rx(skb); } else { priv->nstats.rx_dropped++; @@ -494,7 +493,6 @@ void hostif_data_indication(struct ks_wlan_private *priv) skb->protocol = eth_type_trans(skb, skb->dev); priv->nstats.rx_packets++; priv->nstats.rx_bytes += rx_ind_size; - skb->dev->last_rx = jiffies; netif_rx(skb); } else { priv->nstats.rx_dropped++; diff --git a/drivers/staging/netlogic/xlr_net.c b/drivers/staging/netlogic/xlr_net.c index f84069f..781ef62 100644 --- a/drivers/staging/netlogic/xlr_net.c +++ b/drivers/staging/netlogic/xlr_net.c @@ -155,7 +155,6 @@ static void xlr_net_fmn_handler(int bkt, int src_stnid, int size, int code, skb_reserve(skb, BYTE_OFFSET); skb_put(skb, length); skb->protocol = eth_type_trans(skb, skb->dev); - skb->dev->last_rx = jiffies; netif_rx(skb); /* Fill rx ring */ skb_data = xlr_alloc_skb(); diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c index e5ba7d1..43a7774 100644 --- a/drivers/staging/rtl8192e/rtllib_rx.c +++ b/drivers/staging/rtl8192e/rtllib_rx.c @@ -1375,7 +1375,6 @@ static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb, ieee->LinkDetectInfo.NumRecvDataInPeriod++; ieee->LinkDetectInfo.NumRxOkInPeriod++; } - dev->last_rx = jiffies;

/* Data frame - extract src/dst addresses */ rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid); diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c index 82f6543..b1f2fdf 100644 --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c @@ -1103,11 +1103,7 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, stats = hostap_get_stats(dev); from_assoc_ap = 1; } -#endif - - dev->last_rx = jiffies;

-#ifdef NOT_YET if ((ieee->iw_mode == IW_MODE_MASTER || ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) { diff --git a/drivers/staging/wlan-ng/hfa384x_usb.c b/drivers/staging/wlan-ng/hfa384x_usb.c index 4fe037a..6134eba 100644 --- a/drivers/staging/wlan-ng/hfa384x_usb.c +++ b/drivers/staging/wlan-ng/hfa384x_usb.c @@ -3409,7 +3409,6 @@ static void hfa384x_usbin_rx(struct wlandevice *wlandev, struct sk_buff *skb) &usbin->rxfrm.desc.frame_control, hdrlen);

skb->dev = wlandev->netdev; - skb->dev->last_rx = jiffies;

/* And set the frame length properly */ skb_trim(skb, data_len + hdrlen); diff --git a/drivers/staging/wlan-ng/p80211netdev.c b/drivers/staging/wlan-ng/p80211netdev.c index 73fcf07..53dbbd6 100644 --- a/drivers/staging/wlan-ng/p80211netdev.c +++ b/drivers/staging/wlan-ng/p80211netdev.c @@ -252,7 +252,6 @@ static int p80211_convert_to_ether(struct wlandevice *wlandev, }

if (skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0) { - skb->dev->last_rx = jiffies; wlandev->netdev->stats.rx_packets++; wlandev->netdev->stats.rx_bytes += skb->len; netif_rx_ni(skb); @@ -287,7 +286,6 @@ static void p80211netdev_rx_bh(unsigned long arg) skb->ip_summed = CHECKSUM_NONE; skb->pkt_type = PACKET_OTHERHOST; skb->protocol = htons(ETH_P_80211_RAW); - dev->last_rx = jiffies;

dev->stats.rx_packets++; dev->stats.rx_bytes += skb->len; diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 97ae0ac..3868c32 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1551,7 +1551,6 @@ enum netdev_priv_flags { * @ax25_ptr: AX.25 specific data * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering * - * @last_rx: Time of last Rx * @dev_addr: Hw address (before bcast, * because most packets are unicast) * @@ -1777,8 +1776,6 @@ struct net_device { /* * Cache lines mostly used on receive path (including eth_type_trans()) */ - unsigned long last_rx; - /* Interface address info used in eth_type_trans() */ unsigned char *dev_addr;

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c index e7f690b..36917a7 100644 --- a/net/batman-adv/bridge_loop_avoidance.c +++ b/net/batman-adv/bridge_loop_avoidance.c @@ -449,7 +449,6 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, batadv_inc_counter(bat_priv, BATADV_CNT_RX); batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, skb->len + ETH_HLEN); - soft_iface->last_rx = jiffies;

netif_rx(skb); out: diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index 49576c5..6394206 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -1050,7 +1050,6 @@ bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, bat_priv->soft_iface); bat_priv->stats.rx_packets++; bat_priv->stats.rx_bytes += skb->len + ETH_HLEN + hdr_size; - bat_priv->soft_iface->last_rx = jiffies;

netif_rx(skb_new); batadv_dbg(BATADV_DBG_DAT, bat_priv, "ARP request replied locally\n"); diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 7b3494a..420e19b 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -481,8 +481,6 @@ void batadv_interface_rx(struct net_device *soft_iface, batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, skb->len + ETH_HLEN);

- soft_iface->last_rx = jiffies; - /* Let the bridge loop avoidance check the packet. If will * not handle it, we can safely push it up. */