Commit 6b04ce96 authored by Karol Herbst's avatar Karol Herbst

nouveau: explicitly wait on the fence in nouveau_bo_move_m2mf

It is a bit unlcear to us why that's helping, but it does and unbreaks
suspend/resume on a lot of GPUs without any known drawbacks.

Cc: stable@vger.kernel.org # v5.15+
Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/156Signed-off-by: default avatarKarol Herbst <kherbst@redhat.com>
Reviewed-by: default avatarLyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220819200928.401416-1-kherbst@redhat.com
parent ea2aa97c
......@@ -820,6 +820,15 @@ nouveau_bo_move_m2mf(struct ttm_buffer_object *bo, int evict,
if (ret == 0) {
ret = nouveau_fence_new(chan, false, &fence);
if (ret == 0) {
/* TODO: figure out a better solution here
*
* wait on the fence here explicitly as going through
* ttm_bo_move_accel_cleanup somehow doesn't seem to do it.
*
* Without this the operation can timeout and we'll fallback to a
* software copy, which might take several minutes to finish.
*/
nouveau_fence_wait(fence, false, false);
ret = ttm_bo_move_accel_cleanup(bo,
&fence->base,
evict, false,
......
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