drm/shmem-helpers: Ensure get_pages is not called on imported dma-buf

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Just a bit of light paranoia. Also sprinkle this check over
drm_gem_shmem_get_sg_table, which should only be called when
exporting, same for the pin/unpin functions, on which it relies to
work correctly.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200511093554.211493-9-daniel.vetter@ffwll.ch

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Daniel Vetter 2020-05-11 11:35:53 +02:00

parent 6e60d5ded0

commit 5264083573

1 changed files with 10 additions and 0 deletions

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drivers/gpu/drm/drm_gem_shmem_helper.c

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