drm/nouveau: require reservations for nouveau_fence_sync and nouveau_bo_fence
This will ensure we always hold the required lock when calling those functions.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 65b4fd5..54b1f3d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -717,6 +717,9 @@
}
mutex_lock(&cli->mutex);
+ ret = ttm_bo_reserve(&new_bo->bo, true, false, false, NULL);
+ if (ret)
+ goto fail_unpin;
/* synchronise rendering channel with the kernel's channel */
spin_lock(&new_bo->bo.bdev->fence_lock);
@@ -724,12 +727,18 @@
spin_unlock(&new_bo->bo.bdev->fence_lock);
ret = nouveau_fence_sync(fence, chan);
nouveau_fence_unref(&fence);
- if (ret)
+ if (ret) {
+ ttm_bo_unreserve(&new_bo->bo);
goto fail_unpin;
+ }
- ret = ttm_bo_reserve(&old_bo->bo, true, false, false, NULL);
- if (ret)
- goto fail_unpin;
+ if (new_bo != old_bo) {
+ ttm_bo_unreserve(&new_bo->bo);
+
+ ret = ttm_bo_reserve(&old_bo->bo, true, false, false, NULL);
+ if (ret)
+ goto fail_unpin;
+ }
/* Initialize a page flip struct */
*s = (struct nouveau_page_flip_state)
