drm: Take ownership of the dmabuf->obj when exporting
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 7 Dec 2016 21:45:27 +0000 (21:45 +0000)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 8 Dec 2016 09:29:22 +0000 (10:29 +0100)
commit72a93e8dd52c9feea42f1258d555e6070680a347
tree881432ea83e9dfb888bfd5a52d5175f22703a4a9
parentf3f4c4d68a2862c361fd9890998275da5ef02724
drm: Take ownership of the dmabuf->obj when exporting

Currently the reference for the dmabuf->obj is incremented for the
dmabuf in drm_gem_prime_handle_to_fd() (at the high level userspace
interface), but is released in drm_gem_dmabuf_release() (the lowlevel
handler). Improve the symmetry of the dmabuf->obj ownership by acquiring
the reference in drm_gem_dmabuf_export(). This makes it easier to use
the prime functions directly.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Update kerneldoc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161207214527.22533-1-chris@chris-wilson.co.uk
drivers/gpu/drm/drm_prime.c
drivers/gpu/drm/vgem/vgem_fence.c