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authorThomas Hellstrom <thellstrom@vmware.com>2011-11-21 13:05:02 +0100
committerDave Airlie <airlied@redhat.com>2011-11-22 20:06:21 +0000
commit26cc40a83384178bfaefbcfb4786591498f3e190 (patch)
tree6b82f08110f349b458c001d73f50e6808e96026c
parentcdaeb578aca9e017deb0f55f1af8a94a4d63efb3 (diff)
ttm: Don't return the bo reserved on error path
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>
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 617b64678fc..0bb0f5f713e 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -574,10 +574,16 @@ retry:
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;
}