[PATCH v4 02/11] drm/mxsfb/lcdif: simplify ep pointer management using __free

[Luca Ceresoli <luca.ceresoli@bootlin.com>]

Putting the ep device_node reference requires a of_node_put(ep) in many
return points. Use a cleanup action to simplify the code.

Reviewed-by: Liu Ying <victor.liu@nxp.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
---
This patch is new in v2
---
 drivers/gpu/drm/mxsfb/lcdif_drv.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/mxsfb/lcdif_drv.c b/drivers/gpu/drm/mxsfb/lcdif_drv.c
index 7719629487da..8da8a265c05c 100644
--- a/drivers/gpu/drm/mxsfb/lcdif_drv.c
+++ b/drivers/gpu/drm/mxsfb/lcdif_drv.c
@@ -49,7 +49,7 @@ static const struct drm_encoder_funcs lcdif_encoder_funcs = {
 static int lcdif_attach_bridge(struct lcdif_drm_private *lcdif)
 {
 	struct device *dev = lcdif->drm->dev;
-	struct device_node *ep;
+	struct device_node *ep __free(device_node) = NULL;
 	struct drm_bridge *bridge;
 	int ret;
 
@@ -65,23 +65,19 @@ static int lcdif_attach_bridge(struct lcdif_drm_private *lcdif)
 		ret = of_graph_parse_endpoint(ep, &of_ep);
 		if (ret < 0) {
 			dev_err(dev, "Failed to parse endpoint %pOF\n", ep);
-			of_node_put(ep);
 			return ret;
 		}
 
 		bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, of_ep.id);
-		if (IS_ERR(bridge)) {
-			of_node_put(ep);
+		if (IS_ERR(bridge))
 			return dev_err_probe(dev, PTR_ERR(bridge),
 					     "Failed to get bridge for endpoint%u\n",
 					     of_ep.id);
-		}
 
 		encoder = devm_kzalloc(dev, sizeof(*encoder), GFP_KERNEL);
 		if (!encoder) {
 			dev_err(dev, "Failed to allocate encoder for endpoint%u\n",
 				of_ep.id);
-			of_node_put(ep);
 			return -ENOMEM;
 		}
 
@@ -91,17 +87,14 @@ static int lcdif_attach_bridge(struct lcdif_drm_private *lcdif)
 		if (ret) {
 			dev_err(dev, "Failed to initialize encoder for endpoint%u: %d\n",
 				of_ep.id, ret);
-			of_node_put(ep);
 			return ret;
 		}
 
 		ret = drm_bridge_attach(encoder, bridge, NULL, 0);
-		if (ret) {
-			of_node_put(ep);
+		if (ret)
 			return dev_err_probe(dev, ret,
 					     "Failed to attach bridge for endpoint%u\n",
 					     of_ep.id);
-		}
 	}
 
 	return 0;

-- 
2.53.0