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drm/i915: Report an error when i915.reset prevents a reset

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If the user disables the GPU reset using the i915.reset parameter and
one occurs, report that we failed to reset the GPU. If we return early,
as we currently do, then we leave all state intact (with a hung GPU)
and clients block forever waiting for their requests to complete.

Testcase: igt/gem_eio
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Mark i915.reset as an unsafe modoption, as discussed with
Chris.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson
2015-06-18 11:42:08 +01:00
committed by Daniel Vetter
parent bf13af5625
commit b1330fbb87
4 changed files with 4 additions and 5 deletions
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1
drivers/gpu/drm/i915/i915_dma.c
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@@ -165,7 +165,6 @@ static int i915_getparam(struct drm_device *dev, void *data,
break;
case I915_PARAM_HAS_GPU_RESET:
value = i915.enable_hangcheck &&
i915.reset &&
intel_has_gpu_reset(dev);
break;
default: