drm/msm: Implement .gem_free_object_unlocked

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We use a llist and a worker to delay the object cleanup. This avoids
taking mmap_sem and struct_mutex in the wrong order when calling
drm_gem_object_put_unlocked() from drm_gem_mmap().

Fixes lockdep problem with copy_from_user() in msm_ioctl_gem_submit().

Signed-off-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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Kristian H. Kristensen 2019-03-20 10:09:08 -07:00 • committed by Rob Clark

parent fb076b15d5

commit 48e7f18392

4 changed files with 46 additions and 2 deletions

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5

drivers/gpu/drm/msm/msm_drv.c

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5

drivers/gpu/drm/msm/msm_drv.h

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35

drivers/gpu/drm/msm/msm_gem.c

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3

drivers/gpu/drm/msm/msm_gem.h

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