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2b38705981
In all likelihood we will do a few hundred errnoneous register
operations if we do a single invalid register access whilst the device
is suspended. As each instance causes a WARN, this floods the system
logs and can make the system unresponsive.
The warning was first introduced in
commit b2ec142cb0
Author: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Fri Feb 21 13:52:25 2014 -0300
drm/i915: call assert_device_not_suspended at gen6_force_wake_work
and despite the claims the WARN is still encountered in the wild today.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>