From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Mon, 10 Nov 2014 10:23:01 +0000 (+0200)
Subject: drm/omap: tiler: fix race condition with engine->async
X-Git-Tag: omap-for-v4.2/o2_dc~72^2~15^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7e24df4715906ad25041b0a4ca613186d4cf849;p=pandora-kernel.git

drm/omap: tiler: fix race condition with engine->async

The tiler irq handler uses engine->async value, but the code that sets
engine->async and enables the interrupt does not have a barrier. This
may cause the irq handler to see the old value of engine->async, causing
memory corruption.

Reported-by: Harinarayan Bhatta <harinarayan@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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