[v2] drm/bridge_connector: Handle drm_connector_init_with_ddc() failures

Commit Message

Geert Uytterhoeven June 20, 2023, 6:50 a.m. UTC

drm_connector_init_with_ddc() can fail, but the call in
drm_bridge_connector_init() does not check that.  Fix this by adding
the missing error handling.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
---
v2:
  - Move declaration of ret to its own line,
  - Add Reviewed-by.
---
 drivers/gpu/drm/drm_bridge_connector.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

Comments

Maxime Ripard June 20, 2023, 10:51 a.m. UTC | #1

On Tue, Jun 20, 2023 at 08:50:44AM +0200, Geert Uytterhoeven wrote:
> drm_connector_init_with_ddc() can fail, but the call in
> drm_bridge_connector_init() does not check that.  Fix this by adding
> the missing error handling.
> 
> Signed-off-by: Geert Uytterhoeven <[e-mail]>
> Reviewed-by: Laurent Pinchart <[e-mail]>

Reviewed-by: Maxime Ripard <[e-mail]>

Maxime

Patch

diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
index 19ae4a177ac386b2..1f6fc9b0ae649f54 100644
--- a/drivers/gpu/drm/drm_bridge_connector.c
+++ b/drivers/gpu/drm/drm_bridge_connector.c
@@ -318,6 +318,7 @@  struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 	struct i2c_adapter *ddc = NULL;
 	struct drm_bridge *bridge, *panel_bridge = NULL;
 	int connector_type;
+	int ret;
 
 	bridge_connector = kzalloc(sizeof(*bridge_connector), GFP_KERNEL);
 	if (!bridge_connector)
@@ -368,8 +369,14 @@  struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 		return ERR_PTR(-EINVAL);
 	}
 
-	drm_connector_init_with_ddc(drm, connector, &drm_bridge_connector_funcs,
-				    connector_type, ddc);
+	ret = drm_connector_init_with_ddc(drm, connector,
+					  &drm_bridge_connector_funcs,
+					  connector_type, ddc);
+	if (ret) {
+		kfree(bridge_connector);
+		return ERR_PTR(ret);
+	}
+
 	drm_connector_helper_add(connector, &drm_bridge_connector_helper_funcs);
 
 	if (bridge_connector->bridge_hpd)