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| author |   Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2023-05-30 01:39:30 +0300 |
|---|---|---|
| committer | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2023-06-21 20:22:20 +0300 |
| commit | 6f508c8875702ff865440cfff3929dd36083e8b2 (patch) | |
| tree | 88e5d835cc1ee763e10adab5d05d5285686558cb /drivers/dma-buf/heaps/cma_heap.c | |
| parent | MAINTAINERS: Add myself as reviewer for mgag200 and ast drivers (diff) | |
| download | wireguard-linux-6f508c8875702ff865440cfff3929dd36083e8b2.tar.xz wireguard-linux-6f508c8875702ff865440cfff3929dd36083e8b2.zip | |
media: videobuf2: Don't assert held reservation lock for dma-buf mmapping
Don't assert held dma-buf reservation lock on memory mapping of exported
buffer.
We're going to change dma-buf mmap() locking policy such that exporters
will have to handle the lock. The previous locking policy caused deadlock
problem for DRM drivers in a case of self-imported dma-bufs once these
drivers are moved to use reservation lock universally. The problem is
solved by moving the lock down to exporters. This patch prepares videobuf2
for the locking policy update.
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230529223935.2672495-2-dmitry.osipenko@collabora.com
Diffstat (limited to 'drivers/dma-buf/heaps/cma_heap.c')
0 files changed, 0 insertions, 0 deletions