[PATCH v9 4/7] drm/atomic: Call complete_signaling only if prepare_signaling is done

[Arun R Murthy <arun.r.murthy@intel.com>]

Upon returning valid error code on atomic_ioctl failure, changes have
been done to goto error/out in cases of error instead of returining to
accommodate returning the failure codes. As part of this change
complete_signaling() will be called as part of cleanup. Check if the
fences are initialized/prepared before completing.

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/drm_atomic_uapi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index c228c9aed75acdb09a80df5dad54440a5c182254..bcd12b6eac4f497d2edb8581d9fb0fd54cbef827 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -1569,7 +1569,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
 	struct drm_modeset_acquire_ctx ctx;
 	struct drm_out_fence_state *fence_state;
 	int ret = 0;
-	unsigned int i, j, num_fences;
+	unsigned int i, j, num_fences = 0;
 	bool async_flip = false;
 
 	/* disallow for drivers not supporting atomic: */
@@ -1725,7 +1725,8 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
 	}
 
 out:
-	complete_signaling(dev, state, fence_state, num_fences, !ret);
+	if (num_fences)
+		complete_signaling(dev, state, fence_state, num_fences, !ret);
 
 	if (ret == -EDEADLK) {
 		drm_atomic_state_clear(state);

-- 
2.25.1