From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 15 Jul 2015 08:50:42 +0000 (+0100)
Subject: drm/i915: Replace WARN inside I915_READ64_2x32 with retry loop
X-Git-Tag: omap-for-v4.3/fixes-merge-window~162^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ee0a227b7ac6e75f28e10269f81c7ec6eb600952;p=pandora-kernel.git

drm/i915: Replace WARN inside I915_READ64_2x32 with retry loop

Since we may conceivably encounter situations where the upper part of the
64bit register changes between reads, for example when a timestamp
counter overflows, change the WARN into a retry loop.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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