[3.11.y.z extended stable] Patch "net, via-rhine: Fix tx_timeout handling" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    net,via-rhine: Fix tx_timeout handling

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 132bd0077294a27d656d544599f4a2b470cac2aa Mon Sep 17 00:00:00 2001
From: Richard Weinberger <richard at nod.at>
Date: Tue, 14 Jan 2014 22:46:36 +0100
Subject: net,via-rhine: Fix tx_timeout handling

commit a926592f5e4e900f3fa903298c4619a131e60963 upstream.

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 at nod.at>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/ethernet/via/via-rhine.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/via/via-rhine.c b/drivers/net/ethernet/via/via-rhine.c
index 685d8e2..b83c080 100644
--- a/drivers/net/ethernet/via/via-rhine.c
+++ b/drivers/net/ethernet/via/via-rhine.c
@@ -1615,6 +1615,7 @@ 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 */
--
1.8.3.2