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authorMaarten Lankhorst <maarten.lankhorst@canonical.com>2014-01-21 13:07:01 +0100
committerMaarten Lankhorst <maarten.lankhorst@canonical.com>2014-09-01 10:16:43 +0200
commit7040138ff85501931138970663a988f48c0666f0 (patch)
tree66152b3f394328070d4dbe409fd5fddbb5bc069e /drivers/gpu/drm/ttm
parentbdaf7ddf652ef51fd363b052e320711c06f6f553 (diff)
downloadop-kernel-dev-7040138ff85501931138970663a988f48c0666f0.zip
op-kernel-dev-7040138ff85501931138970663a988f48c0666f0.tar.gz
drm/ttm: call ttm_bo_wait while inside a reservation
This is the last remaining function that doesn't use the reservation lock completely to fence off access to a buffer. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Diffstat (limited to 'drivers/gpu/drm/ttm')
-rw-r--r--drivers/gpu/drm/ttm/ttm_bo.c25
1 files changed, 12 insertions, 13 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index b992ec3..4f1bc94 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -503,17 +503,6 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
if (ret)
return ret;
- /*
- * remove sync_obj with ttm_bo_wait, the wait should be
- * finished, and no new wait object should have been added.
- */
- spin_lock(&bdev->fence_lock);
- ret = ttm_bo_wait(bo, false, false, true);
- WARN_ON(ret);
- spin_unlock(&bdev->fence_lock);
- if (ret)
- return ret;
-
spin_lock(&glob->lru_lock);
ret = __ttm_bo_reserve(bo, false, true, false, NULL);
@@ -529,8 +518,16 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
spin_unlock(&glob->lru_lock);
return 0;
}
- } else
- spin_unlock(&bdev->fence_lock);
+
+ /*
+ * remove sync_obj with ttm_bo_wait, the wait should be
+ * finished, and no new wait object should have been added.
+ */
+ spin_lock(&bdev->fence_lock);
+ ret = ttm_bo_wait(bo, false, false, true);
+ WARN_ON(ret);
+ }
+ spin_unlock(&bdev->fence_lock);
if (ret || unlikely(list_empty(&bo->ddestroy))) {
__ttm_bo_unreserve(bo);
@@ -1524,6 +1521,8 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
void *sync_obj;
int ret = 0;
+ lockdep_assert_held(&bo->resv->lock.base);
+
if (likely(bo->sync_obj == NULL))
return 0;
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