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drm/i915: Warn if we receive an interrupt after freeing the buffer

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This shouldn't happen as the buffer is freed after disable pipe CRCs,
but better be safe than sorry.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-10-15 18:55:37 +01:00 committed by Daniel Vetter
parent bd9db02ffc
commit 0c912c79ee
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/i915/i915_irq.c
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@ -1197,6 +1197,11 @@ static void ivb_pipe_crc_update(struct drm_device *dev, enum pipe pipe)
struct intel_pipe_crc_entry *entry;
int head, tail;
if (!pipe_crc->entries) {
DRM_ERROR("spurious interrupt\n");
return;
}
head = atomic_read(&pipe_crc->head);
tail = atomic_read(&pipe_crc->tail);