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ttm: Don't return the bo reserved on error path

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An unlikely race could case a bo to be returned reserved on an error path.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2011-11-21 13:05:02 +01:00 committed by Dave Airlie
parent cdaeb578ac
commit 26cc40a833
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/ttm/ttm_bo.c
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@ -574,10 +574,16 @@ static int ttm_bo_cleanup_refs(struct ttm_buffer_object *bo,
return ret;
spin_lock(&glob->lru_lock);
if (unlikely(list_empty(&bo->ddestroy))) {
spin_unlock(&glob->lru_lock);
return 0;
}
ret = ttm_bo_reserve_locked(bo, interruptible,
no_wait_reserve, false, 0);
if (unlikely(ret != 0) || list_empty(&bo->ddestroy)) {
if (unlikely(ret != 0)) {
spin_unlock(&glob->lru_lock);
return ret;
}