From: Christian Lamparter <chunkeey@web.de>
Date: Sat, 28 Mar 2009 00:46:14 +0000 (+0100)
Subject: ar9170: fix hang on stop
X-Git-Tag: v2.6.31-rc1~330^2~568^2~161
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=32c1628f153a5468cf48be5e5c04cd599ae9e01d;p=pandora-kernel.git

ar9170: fix hang on stop

This patch fixes a locking problem which freezes the network core.

The deadlock goes as follows:
- ar9170_op_stop - is called
1. change the state to IDLE
2. > take the MUTEX <
3. cancel_SYNC all pending work, which means
    "block until a work_struct's callback has terminated"
=>  if filter_config_work was queued it tries to get the MUTEX,
       before checking the device state...

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

Reading git-diff-tree failed