bnx2x: smp_mb and not just smp_rmb

Signed-off-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bnx2x_main.c

@@ -7173,7 +7173,7 @@ static int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode)
 		struct bnx2x_fastpath *fp = &bp->fp[i];
 
 		cnt = 1000;
-		smp_rmb();
+		smp_mb();
 		while (bnx2x_has_tx_work_unload(fp)) {
 
 			bnx2x_tx_int(fp, 1000);
@@ -7189,7 +7189,7 @@ static int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode)
 			}
 			cnt--;
 			msleep(1);
-			smp_rmb();
+			smp_mb();
 		}
 	}
 	/* Give HW time to discard old tx messages */