From: Anton Vorontsov <avorontsov@ru.mvista.com>
Date: Wed, 30 Dec 2009 08:23:32 +0000 (+0000)
Subject: ucc_geth: Fix netdev watchdog triggering on suspend
X-Git-Tag: v2.6.33-rc4~10^2~50
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29fb00e047eae927a3f1a0367c0cfed7ad5228ef;p=pandora-kernel.git

ucc_geth: Fix netdev watchdog triggering on suspend

Sometimes ucc_geth fails to suspend with the following trace:

 ucc_geth e0103000.ucc: suspend
 ucc_geth e0102000.ucc: suspend
 NETDEV WATCHDOG: eth0 (ucc_geth): transmit queue 0 timed out
 ------------[ cut here ]------------
 Badness at net/sched/sch_generic.c:255
 NIP: c021cb5c LR: c021cb5c CTR: c01ab4b4
 [...]
 NIP [c021cb5c] dev_watchdog+0x298/0x2a8
 LR [c021cb5c] dev_watchdog+0x298/0x2a8
 Call Trace:
 [c0389da0] [c021cb5c] dev_watchdog+0x298/0x2a8 (unreliable)
 [c0389e00] [c0031ed8] run_timer_softirq+0x16c/0x1dc
 [c0389e50] [c002c638] __do_softirq+0xa4/0x11c
 [...]

This patch fixes the issue by properly detaching the device on
suspend, and attaching it back on resume.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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