[PATCH v2 00/12] drm: add check if io_mem_pfn is NULL and cleanup

[Tan Xiaojun]

I found an OOPS when I used the mainline kernel for graphical tests in Hisilicon
D05, I do not know how to solve this problem until I saw your discussion on this
issue a month ago:

https://lists.freedesktop.org/archives/dri-devel/2017-November/159046.html

And my problem can be solved perfectly by your solution.

This is important for me, I want to solve this problem as soon as possible. So
I follow the result of your discussion, make and send these patches below.

If anything is not good, please point it out, thanks.

Change logs of v2:
 * add new function to instead of ttm_bo_default_io_mem_pfn() and
   do some cleanup.

Tan Xiaojun (12):
  drm/ttm: add ttm_bo_io_mem_pfn to check io_mem_pfn
  drm/ast: remove the default io_mem_pfn set
  drm/bochs: remove the default io_mem_pfn set
  drm/cirrus: remove the default io_mem_pfn set
  drm/mgag200: remove the default io_mem_pfn set
  drm/nouveau: remove the default io_mem_pfn set
  drm/qxl: remove the default io_mem_pfn set
  drm/radeon: remove the default io_mem_pfn set
  drm/virtio: remove the default io_mem_pfn set
  drm/vmwgfx: remove the default io_mem_pfn set
  staging: remove the default io_mem_pfn set
  drm/ttm: remove ttm_bo_default_io_mem_pfn

 drivers/gpu/drm/ast/ast_ttm.c          |  1 -
 drivers/gpu/drm/bochs/bochs_mm.c       |  1 -
 drivers/gpu/drm/cirrus/cirrus_ttm.c    |  1 -
 drivers/gpu/drm/mgag200/mgag200_ttm.c  |  1 -
 drivers/gpu/drm/nouveau/nouveau_bo.c   |  1 -
 drivers/gpu/drm/qxl/qxl_ttm.c          |  1 -
 drivers/gpu/drm/radeon/radeon_ttm.c    |  1 -
 drivers/gpu/drm/ttm/ttm_bo_vm.c        | 22 +++++++++++++---------
 drivers/gpu/drm/virtio/virtgpu_ttm.c   |  1 -
 drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c |  1 -
 drivers/staging/vboxvideo/vbox_ttm.c   |  1 -
 include/drm/ttm/ttm_bo_api.h           | 11 -----------
 12 files changed, 13 insertions(+), 30 deletions(-)

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2.7.4