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bnx2x: use smp_mb() to keep ordering of read write operations 

Since we want to keep ordering of write to fp->bd_tx_cons and
netif_tx_queue_stopped(txq), what is read of txq->state, we have to use
general memory barrier.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stanislaw Gruszka 2010-03-09 06:55:00 +00:00 committed by David S. Miller
parent d4a2ac3e80
commit 2d99cf16f4
1 changed files with 1 additions and 1 deletions
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2
drivers/net/bnx2x_main.c
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@ -963,7 +963,7 @@ static int bnx2x_tx_int(struct bnx2x_fastpath *fp)
* start_xmit() will miss it and cause the queue to be stopped
* forever.
*/
smp_wmb();
smp_mb();
/* TBD need a thresh? */
if (unlikely(netif_tx_queue_stopped(txq))) {