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drm/i915: Set guilty-flag on fence after detecting a hang

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The struct dma_fence carries a status field exposed to userspace by
sync_file. This is inspected after the fence is signaled and can convey
whether or not the request completed successfully, or in our case if we
detected a hang during the request (signaled via -EIO in
SYNC_IOC_FILE_INFO).

v2: Mark all cancelled requests as failed.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170110172246.27297-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-01-10 17:22:43 +00:00
parent 2edc6e0df1
commit c0d5f32c50
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_gem.c
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@ -2626,6 +2626,8 @@ static void reset_request(struct drm_i915_gem_request *request)
head = 0;
}
memset(vaddr + head, 0, request->postfix - head);
dma_fence_set_error(&request->fence, -EIO);
}
void i915_gem_reset_prepare(struct drm_i915_private *dev_priv)