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bnx2x: change smp_mb() comment to conform the true

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Access to fp->tx_bp_prod is protected by __netif_tx_lock,
smp_mb() is not needed for that.

Signed-off-by: Stanislaw Gruszka <[email protected]>
Signed-off-by: Eilon Greenstein <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Stanislaw Gruszka 2010-03-09 06:55:02 +00:00 • committed by David S. Miller
commit 9baddeb8c6
1 changed files with 5 additions and 2 deletions
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7
drivers/net/bnx2x_main.c
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@ -11428,9 +11428,12 @@ static netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (unlikely(bnx2x_tx_avail(fp) < MAX_SKB_FRAGS + 3)) {
netif_tx_stop_queue(txq);
/* We want bnx2x_tx_int to "see" the updated tx_bd_prod
if we put Tx into XOFF state. */
/* paired memory barrier is in bnx2x_tx_int(), we have to keep
* ordering of set_bit() in netif_tx_stop_queue() and read of
* fp->bd_tx_cons */
smp_mb();
fp->eth_q_stats.driver_xoff++;
if (bnx2x_tx_avail(fp) >= MAX_SKB_FRAGS + 3)
netif_tx_wake_queue(txq);