linux/drivers/gpu
Rob Clark 09bf649a74
drm/shmem-helper: Avoid vm_open error paths
vm_open() is not allowed to fail.  Fortunately we are guaranteed that
the pages are already pinned, thanks to the initial mmap which is now
being cloned into a forked process, and only need to increment the
refcnt.  So just increment it directly.  Previously if a signal was
delivered at the wrong time to the forking process, the
mutex_lock_interruptible() could fail resulting in the pages_use_count
not being incremented.

Fixes: 2194a63a81 ("drm: Add library for shmem backed GEM objects")
Cc: stable@vger.kernel.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221130185748.357410-3-robdclark@gmail.com
2022-12-04 18:56:53 +01:00
..
drm drm/shmem-helper: Avoid vm_open error paths 2022-12-04 18:56:53 +01:00
host1x gpu: host1x: Use the bitmap API to allocate bitmaps 2022-07-08 17:38:34 +02:00
ipu-v3 drm/imx: various cleanups 2022-05-06 15:07:39 +10:00
trace
vga
Makefile gpu: host1x: Add context bus 2022-06-01 11:50:42 +02:00