[PATCH 3.4 31/37] net,via-rhine: Fix tx_timeout handling

From: Greg Kroah-Hartman
Date: Tue Feb 04 2014 - 18:12:53 EST


3.4-stable review patch. If anyone has any objections, please let me know.

------------------

From: Richard Weinberger <richard@xxxxxx>

[ Upstream commit a926592f5e4e900f3fa903298c4619a131e60963 ]

rhine_reset_task() misses to disable the tx scheduler upon reset,
this can lead to a crash if work is still scheduled while we're resetting
the tx queue.

Fixes:
[ 93.591707] BUG: unable to handle kernel NULL pointer dereference at 0000004c
[ 93.595514] IP: [<c119d10d>] rhine_napipoll+0x491/0x6

Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/via/via-rhine.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/net/ethernet/via/via-rhine.c
+++ b/drivers/net/ethernet/via/via-rhine.c
@@ -1601,6 +1601,7 @@ static void rhine_reset_task(struct work
goto out_unlock;

napi_disable(&rp->napi);
+ netif_tx_disable(dev);
spin_lock_bh(&rp->lock);

/* clear all descriptors */


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