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SubjectRe: BNX2: Kernel crashes with 2.6.31 and 2.6.31.9
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On Thu, 2010-03-11 at 11:40 -0800, Brian Haley wrote:
> I can only reproduce this on one system out of many, so it's either a
> race condition or bad hardware. The only thing I can confirm at the
> moment is that it's the code at the bottom of bnx2_set_coalesce()
> that's causing it, I'm trying to go through all those codepaths now.
>

The NETDEV WATCHDOG is caused by stopping the TX queues with
->trans_start older than dev->watchdog_timeo which is set to 5 seconds
in bnx2. Please try this patch below to update the ->trans_start first
before stopping the TX queues:

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index d3f739a..c0f4aa7 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -656,7 +656,6 @@ bnx2_netif_stop(struct bnx2 *bp)
int i;

bnx2_napi_disable(bp);
- netif_tx_disable(bp->dev);
/* prevent tx timeout */
for (i = 0; i < bp->dev->num_tx_queues; i++) {
struct netdev_queue *txq;
@@ -664,6 +663,7 @@ bnx2_netif_stop(struct bnx2 *bp)
txq = netdev_get_tx_queue(bp->dev, i);
txq->trans_start = jiffies;
}
+ netif_tx_disable(bp->dev);
}
bnx2_disable_int_sync(bp);
}




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