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net,via-rhine: Fix tx_timeout handling

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[ Upstream commit a926592f5e ]

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@nod.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Richard Weinberger 2014-01-14 22:46:36 +01:00 • committed by Greg Kroah-Hartman
commit 45a7ed6dd0
1 changed files with 1 additions and 0 deletions
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drivers/net/ethernet/via/via-rhine.c
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@ -1611,6 +1611,7 @@ static void rhine_reset_task(struct work_struct *work)
goto out_unlock;
napi_disable(&rp->napi);
netif_tx_disable(dev);
spin_lock_bh(&rp->lock);
/* clear all descriptors */