netdev - [PATCH] bnx2: reset_task is crashing the kernel. Fixing it.

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Message-Id: <1260990759-16236-1-git-send-email-leitao@linux.vnet.ibm.com>
Date:	Wed, 16 Dec 2009 13:12:39 -0600
From:	leitao@...ux.vnet.ibm.com
To:	mchan@...adcom.com
Cc:	netdev@...r.kernel.org, Breno Leitao <leitao@...ux.vnet.ibm.com>
Subject: [PATCH] bnx2: reset_task is crashing the kernel. Fixing it.

If bnx2 schedules a reset via the reset_task, e.g., due to a TX
timeout, it's possible for the NIC to be disabled with packets
pending for transmit.  In this case, napi_disable will loop forever,
eventually crashing the kernel.  This patch moves the disable of
the device to after the napi_disable call.

Signed-off-by: Breno Leitao <leitao@...ux.vnet.ibm.com>
---
 drivers/net/bnx2.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index f81f082..65df1de 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -653,7 +653,6 @@ static void
 bnx2_netif_stop(struct bnx2 *bp)
 {
 	bnx2_cnic_stop(bp);
-	bnx2_disable_int_sync(bp);
 	if (netif_running(bp->dev)) {
 		int i;

@@ -667,6 +666,7 @@ bnx2_netif_stop(struct bnx2 *bp)
 			txq->trans_start = jiffies;
 		}
 	}
+	bnx2_disable_int_sync(bp);
 }

 static void
-- 
1.6.0.2

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