[PATCH 0/2] drm/exynos: fix invalid memory access

[Inki Dae]

This patch releases the fb pended by page flip after fbdev is
restored propely. And fixes invalid memory access when drm is
released while doing pageflip.

This patch makes fb's refcount to be increased when setcrtc and
pageflip are requested. In other words, it increases fb's refcount
only if dma is going to access memory region to fb and decreases
old fb's because the old fb isn't accessed by dma anymore.

This could guarantee releasing gem buffer to the fb after dma
access to the gem buffer has been completed.

Inki Dae (2):
  drm/exynos: remove unnecessary code.
  drm/exynos: release fb pended by page flip

 drivers/gpu/drm/exynos/exynos_drm_crtc.c  |   42 ++++++++++++++++++++++++++++-
 drivers/gpu/drm/exynos/exynos_drm_fb.c    |   23 ++++++++++++++++
 drivers/gpu/drm/exynos/exynos_drm_fb.h    |    6 ++++
 drivers/gpu/drm/exynos/exynos_drm_fbdev.c |    9 ++++++
 drivers/gpu/drm/exynos/exynos_drm_plane.c |   19 +++++++++++-
 5 files changed, 96 insertions(+), 3 deletions(-)

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1.7.4.1