On 08/11/2015 07:35 PM, Antonio Quartulli wrote:
From: Linus Lüssing linus.luessing@c0d3.blue
Bitwise OR/AND assignments in C aren't guaranteed to be atomic. One OGM handler might undo the set/clear of a specific bit from another handler run in between.
Fix this by using the atomic set_bit()/clear_bit()/test_bit() functions.
Fixes: 3f4841ffb336 ("batman-adv: tvlv - add network coding container") Signed-off-by: Linus Lüssing linus.luessing@c0d3.blue Signed-off-by: Marek Lindner mareklindner@neomailbox.ch Signed-off-by: Antonio Quartulli antonio@meshcoding.com
net/batman-adv/network-coding.c | 7 ++++--- net/batman-adv/types.h | 2 +- 2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c index f0a50f3..cfdc80d 100644 --- a/net/batman-adv/network-coding.c +++ b/net/batman-adv/network-coding.c
[...]
@@ -894,7 +895,7 @@ void batadv_nc_update_nc_node(struct batadv_priv *bat_priv, goto out;
/* check if orig node is network coding enabled */
- if (!(orig_node->capabilities & BATADV_ORIG_CAPA_HAS_NC))
- if (!(test_bit(BATADV_ORIG_CAPA_HAS_NC, &orig_node->capabilities)))
Likewise, () around the call no needed.
[...]
MBR, Sergei