drm/i915: Kill dangerous pending-flip debugging

We can, by virtue of a vblank interrupt firing in the middle of setting
up the unpin work (i.e. after we set the unpin_work field and before we
write to the ringbuffer) enter intel_finish_page_flip() prior to
receiving the pending flip notification. Therefore we can expect to hit
intel_finish_page_flip() under normal circumstances without a pending flip
and even without installing the pending_flip_obj. This is exacerbated by
aperture thrashing whilst binding the framebuffer

References:

  Bug 28079 - "glresize" causes kernel panic in intel_finish_page_flip.
  https://bugs.freedesktop.org/show_bug.cgi?id=28079

Reported-by: Nick Bowler <[email protected]>
Signed-off-by: Chris Wilson <[email protected]>
Cc: Jesse Barnes <[email protected]>
Cc: [email protected]
Reviewed-by: Jesse Barnes <[email protected]>
Signed-off-by: Eric Anholt <[email protected]>

0 files changed, 0 insertions, 0 deletions