drm/ttm: Fix a theoretical race
The ttm_mem_evict_first function could theoretically drop the lru lock without retrying if a reservation from off the LRU list ended up waiting. However, since currently there are no users that could cause a wait in that situation so this is not suitable for stable Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -817,11 +817,11 @@ retry:
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goto retry;
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}
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ret = ttm_bo_reserve_locked(bo, false, no_wait_reserve, false, 0);
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ret = ttm_bo_reserve_locked(bo, false, true, false, 0);
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if (unlikely(ret == -EBUSY)) {
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spin_unlock(&glob->lru_lock);
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if (likely(!no_wait_gpu))
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if (likely(!no_wait_reserve))
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ret = ttm_bo_wait_unreserved(bo, interruptible);
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kref_put(&bo->list_kref, ttm_bo_release_list);
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