drm/i915: Mark device as wedged if we fail to resume
During module load, if we fail to initialise the rings, we abort the load reporting EIO. However during resume, even though we report EIO as we fail to reinitialize the ringbuffers, the resume continues and the device is restored - albeit in a non-functional state. As we cannot execute any commands on the GPU, it is effectively wedged, mark it so. As we now preserve the ringbuffers across resume, this should prevent UXA from falling into the trap of repeatedly sending invalid batchbuffers and dropping all further rendering into /dev/null. Reported-and-tested-by: NJiri Kosina <jkosina@suse.cz> References: https://bugs.freedesktop.org/show_bug.cgi?id=76554Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Reviewed-by: NOscar Mateo <oscar.mateo@intel.com> [danvet: Drop unused error, spotted by Oscar.] Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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