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drm/nouveau: wait on fence after bo move if validating for another channel

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Not an ideal solution, but it'll do for the moment for correctness.  We
need to come up with a nicer way to manage inter-channel sync, the hw
is unfortunately a little lacking in this area.

Should fix some resume corruption, as well as corruption that may be seen
while under memory pressure.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-01-12 15:28:19 +10:00
commit e147eae80a
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/nouveau/nouveau_bo.c
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@ -469,6 +469,8 @@ nouveau_bo_move_accel_cleanup(struct nouveau_channel *chan,
ret = ttm_bo_move_accel_cleanup(&nvbo->bo, fence, NULL,
evict, no_wait, new_mem);
if (nvbo->channel && nvbo->channel != chan)
ret = nouveau_fence_wait(fence, NULL, false, false);
nouveau_fence_unref((void *)&fence);
return ret;
}