| Date | Fri, 08 Jun 2012 05:19:29 +0100 | From | Ben Hutchings <> | Subject | [ 49/82] drm/ttm: Fix spinlock imbalance |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Hellstrom <thellstrom@vmware.com>
commit a8ff3ee211fccf708e1911bbc096625453ebf759 upstream.
This imbalance may cause hangs when TTM is trying to swap out a buffer that is already on the delayed delete list.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/gpu/drm/ttm/ttm_bo.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 36792bd..b67cfca 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1834,6 +1834,7 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) spin_unlock(&glob->lru_lock); (void) ttm_bo_cleanup_refs(bo, false, false, false); kref_put(&bo->list_kref, ttm_bo_release_list); + spin_lock(&glob->lru_lock); continue; }
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