VMware Balloon driver

[safe/jmp/linux-2.6] / drivers / net / bnx2x_main.c

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index ae62b67..6c042a7 100644 (file)
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -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);