From: Maciej Sosnowski <maciej.sosnowski@intel.com>
Date: Tue, 3 Feb 2009 07:26:57 +0000 (-0800)
Subject: dca: redesign locks to fix deadlocks
X-Git-Tag: v2.6.27.40~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34dcc7657b7e11976cb9ab67e0bd3135539c97ea;p=pandora-kernel.git

dca: redesign locks to fix deadlocks

commit eb4400e3a040b90a3ad805b01fcbc99a5f615c8f upstream.

Change spin_locks to irqsave to prevent dead-locks.
Protect adding and deleting to/from dca_providers list.
Drop the lock during dca_sysfs_add_req() and dca_sysfs_remove_req() calls
as they might sleep (use GFP_KERNEL allocation).

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

Reading git-diff-tree failed