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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-10-05 14:21:44 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-10-05 15:30:32 +0200 |
| commit | a4fce9cb782ad340ee5576a38e934e5e75832dc6 (patch) | |
| tree | 528aa09d8be2f3fcbe72e3a8b972fc6e6711a68d /Documentation/devicetree/bindings | |
| parent | drm/prime: Pass the right module owner through to dma_buf_export() (diff) | |
| download | linux-a4fce9cb782ad340ee5576a38e934e5e75832dc6.tar.xz linux-a4fce9cb782ad340ee5576a38e934e5e75832dc6.zip | |
drm/prime: Take a ref on the drm_dev when exporting a dma_buf
dma_buf may live a long time, longer than the last direct user of the
driver. We already hold a reference to the owner module (that prevents
the object code from disappearing), but there is no reference to the
drm_dev - so the pointers to the driver backend themselves may vanish.
v2: Resist temptation to fix the bug in armada_gem.c not setting the
correct flags on the exported dma-buf (it should pass the flags through
and not be arbitrarily setting O_RDWR).
Use a common wrapper for exporting the dmabuf and acquiring the
reference to the drm_device.
Testcase: igt/vgem_basic/unload
Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Tested-by: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161005122145.1507-2-chris@chris-wilson.co.uk
Diffstat (limited to 'Documentation/devicetree/bindings')
0 files changed, 0 insertions, 0 deletions