From: Sean Paul <seanpaul@chromium.org>
Date: Fri, 16 Mar 2012 16:43:22 +0000 (-0400)
Subject: drm/i915: Add wait_for in init_ring_common
X-Git-Tag: v3.2.28~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e7bbc7d2d8641d1375c29aecd6636f3d670b584;p=pandora-kernel.git

drm/i915: Add wait_for in init_ring_common

commit f01db988ef6f6c70a6cc36ee71e4a98a68901229 upstream.

I have seen a number of "blt ring initialization failed" messages
where the ctl or start registers are not the correct value. Upon further
inspection, if the code just waited a little bit, it would read the
correct value. Adding the wait_for to these reads should eliminate the
issue.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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