From: Ben Widawsky <ben@bwidawsk.net>
Date: Thu, 9 Feb 2012 09:15:19 +0000 (+0100)
Subject: drm/i915: catch gtfifo errors on forcewake_put
X-Git-Tag: v3.4-rc1~143^2~85^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ee64cbdbf617067988168a4a49fcaabdd2743da6;p=pandora-kernel.git

drm/i915: catch gtfifo errors on forcewake_put

This is similar to a patch I wrote several months ago. It's been updated
for the new FORCEWAKE_MT. As recommended by Chris Wilson, use WARN()
instead of DRM_ERROR, so we can get a backtrace.

This shouldn't impact performance too much as the extra register read
can replace the POSTING_READ we had previously.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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