netdev - [PATCH 1/4] bnx2x: use smp_mb() to keep ordering of read write operations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1268153703-4186-1-git-send-email-sgruszka@redhat.com>
Date:	Tue,  9 Mar 2010 17:55:00 +0100
From:	Stanislaw Gruszka <sgruszka@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Vladislav Zolotarov <vladz@...adcom.com>,
	Eilon Greenstein <eilong@...adcom.com>,
	Michael Chan <mchan@...adcom.com>,
	Stanislaw Gruszka <sgruszka@...hat.com>
Subject: [PATCH 1/4] 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@...hat.com>
---
 drivers/net/bnx2x_main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index ed785a3..9fc0f6a 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -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))) {
-- 
1.6.2.5

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html