From e9fea5747d2b3dbff47a8790c1cc4d7af80051d6 Mon Sep 17 00:00:00 2001
From: Naresh Kumar Kachhi <naresh.kumar.kachhi@intel.com>
Date: Wed, 12 Mar 2014 16:39:41 +0530
Subject: [PATCH] drm/i915: wait for rings to become idle once disabled

make sure we wait for rings to become idle once they are
disabled. In case of timeout print an error message

Signed-off-by: Naresh Kumar Kachhi <naresh.kumar.kachhi@intel.com>
[danvet: Frob patch as suggested by Chris.]
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Reading git-format-patch failed