[PATCH] drm/bridge: cdns-mhdp8546: unlock on error in cdns_mhdp_atomic_enable()

[Dan Carpenter]

Unlock and reschedule if drm_mode_duplicate() fails.  In real life, the
drm_mode_duplicate() function does a small allocation and those never
fail in current kernels.  So this doesn't really affect runtime but
the missing unlock triggers a static checker warning.

Fixes: 935a92a1c400 ("drm: bridge: cdns-mhdp8546: Fix possible null pointer dereference")
Signed-off-by: Dan Carpenter <dan.carpenter at linaro.org>
---
 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index b431e7efd1f0..172039fbfab8 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -1984,8 +1984,10 @@ static void cdns_mhdp_atomic_enable(struct drm_bridge *bridge,
 	mhdp_state = to_cdns_mhdp_bridge_state(new_state);
 
 	mhdp_state->current_mode = drm_mode_duplicate(bridge->dev, mode);
-	if (!mhdp_state->current_mode)
-		return;
+	if (!mhdp_state->current_mode) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
 	drm_mode_set_name(mhdp_state->current_mode);
 
-- 
2.47.2