From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri, 27 Apr 2012 13:17:39 +0000 (+0200)
Subject: drm/i915: rework dev->first_error locking
X-Git-Tag: v3.5-rc1~83^2~8^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=742cbee8049f434d8ae7908ee56fe4cad3db2658;p=pandora-kernel.git

drm/i915: rework dev->first_error locking

- reduce the irq disabled section, even for a debugfs file this was
  way too long.
- always disable irqs when taking the lock.

v2: Thou shalt not mistake locking for reference counting, so:
- reference count the error_state to protect from concurent freeeing.
  This will be only really used in the next patch.

Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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