From: Sean Paul <seanpaul@chromium.org>
Date: Fri, 23 Mar 2012 12:52:58 +0000 (-0400)
Subject: drm/i915: Add lock on drm_helper_resume_force_mode
X-Git-Tag: v3.2.15~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3140c5a90be5cc54a68099de13e80a034b6196d;p=pandora-kernel.git

drm/i915: Add lock on drm_helper_resume_force_mode

commit 927a2f119e8235238a2fc64871051b16c9bdae75 upstream.

i915_drm_thaw was not locking the mode_config lock when calling
drm_helper_resume_force_mode. When there were multiple wake sources,
this caused FDI training failure on SNB which in turn corrupted the
display.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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