diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2016-12-12 17:52:45 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2016-12-13 11:39:55 +1000 |
| commit | 10dcab3e7f477bffee88d518aad57d06777cfdf4 (patch) | |
| tree | 36aa6645d0bde81298b80302d4065d8f7676bb13 | |
| parent | 732be80743e72a2e9f04e8a9f369f0c6432b85d1 (diff) | |
drm/nouveau/ttm: wait for bo fence to signal before unmapping vmas
TTM was changed a while back to allow for pipelining of buffer moves, and
part of this was the removal of waiting for a BO to idle before calling
move(), placing the responsibility on the driver to do this if required.
That's all well and good, except, we make use of move_notify() to handle
mapping/unmapping from the GPU VMM as move() isn't called on all paths.
This commit adds a wait before unmapping from a VMM in move_notify(), to
prevent GPU page faults where a buffer is still being accessed.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org [v4.8+]