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drm/i915: Capture the initial error-state when kicking stuck rings 

We lost the ability to capture the first error for a stuck ring in the
recent hangcheck robustification. Whilst both error states are
interesting (why does the GPU not recover is also essential to debug),
our primary goal is to fix the initial hang and so we need to capture
the first error state upon taking hangcheck action.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2013-10-10 09:37:19 +01:00 committed by Daniel Vetter
parent 4c445e0ebc
commit 09e14bf3ba
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_irq.c
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@ -1988,6 +1988,7 @@ ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
if (tmp & RING_WAIT) {
DRM_ERROR("Kicking stuck wait on %s\n",
ring->name);
i915_handle_error(dev, false);
I915_WRITE_CTL(ring, tmp);
return HANGCHECK_KICK;
}
@ -1999,6 +2000,7 @@ ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
case 1:
DRM_ERROR("Kicking stuck semaphore on %s\n",
ring->name);
i915_handle_error(dev, false);
I915_WRITE_CTL(ring, tmp);
return HANGCHECK_KICK;
case 0: