system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-09-25 14:01:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

bnx2x: prevent race in statistics flow

Browse source 
The race may cause access of registers while MAC hw block is
in reset state. As a result syslog will show error messages.
We can prevent this by using state from local variable.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dmitry Kravkov 2011-11-13 04:34:30 +00:00 committed by David S. Miller
parent 8304859adc
commit 4a025f49d3
1 changed files with 3 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
View file

@ -1349,12 +1349,14 @@ void bnx2x_stats_handle(struct bnx2x *bp, enum bnx2x_stats_event event)
enum bnx2x_stats_state state;
if (unlikely(bp->panic))
return;
bnx2x_stats_stm[bp->stats_state][event].action(bp);
spin_lock_bh(&bp->stats_lock);
state = bp->stats_state;
bp->stats_state = bnx2x_stats_stm[state][event].next_state;
spin_unlock_bh(&bp->stats_lock);
bnx2x_stats_stm[state][event].action(bp);
if ((event != STATS_EVENT_UPDATE) || netif_msg_timer(bp))
DP(BNX2X_MSG_STATS, "state %d -> event %d -> state %d\n",
state, event, bp->stats_state);