[Intel-gfx] [PATCH v2 0/4] drm/exynos, intel: fix locking for flip/vbl event list

[Imre Deak]

The patchset adds the missing event_lock when accessing the
vblank_event_list in drm_vblank_off() and as preparation for this
also fixes a few other issues in the exynos driver.

This is also a dependency for Rob Clark's drm_send_vblank_event()
rework as that would trigger a warning for the unhold event_lock without
this changeset.

The exynos changes are only compile tested, the rest is tested on an
Intel IVB machine on top of drm-intel-nightly + drm_send_vblank_event()
rework, with i-g-t/flip_test.

In v2:
- Instead of fixing the event_lock vs. vblank_time_lock lockdep issue in
  drm_handle_vblank(), fix it in the exynos driver. This looks like the
  more logical thing to do and this way we also have a smaller impact on
  the rest of DRM code.

Imre Deak (4):
  drm/exynos: hold event_lock while accessing pageflip_event_list
  drm/exynos: call drm_vblank_put for each queued flip event
  drm/exynos: fix lockdep for event_lock wrt. vbl_time_lock
  drm: hold event_lock while accessing vblank_event_list

 drivers/gpu/drm/drm_irq.c                |    3 +++
 drivers/gpu/drm/exynos/exynos_drm_crtc.c |    5 +++++
 drivers/gpu/drm/exynos/exynos_drm_fimd.c |   20 +-------------------
 drivers/gpu/drm/exynos/exynos_drm_vidi.c |   20 +-------------------
 drivers/gpu/drm/exynos/exynos_mixer.c    |   11 +----------
 5 files changed, 11 insertions(+), 48 deletions(-)

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1.7.9.5