From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue, 17 Jun 2014 20:34:37 +0000 (+0200)
Subject: drm/i915: Grab dev->struct_mutex in i915_gem_pageflip_info
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~125^2~63^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a270ebf341105b85aaf4f5e4336bb53b3c10177;p=pandora-kernel.git

drm/i915: Grab dev->struct_mutex in i915_gem_pageflip_info

We could walk of a bad list otherwise when someone concurrently
unbinds stuff for fun.

I've suspected this as the root-cause behind seemingly inconsistent
state, but alas it's not.

Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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