media: rcar-vin: Improve error paths for parallel devices

Use the __free(fwnode_handle) hooks to free the endpoints when the
function exits to simplify the error paths and make the intent more
clear.

While at it correct the error message when failing to parse an endpoint
to report the correct node.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20250613153434.2001800-8-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-core.c b/drivers/media/platform/renesas/rcar-vin/rcar-core.c
index 95621c11eeccab405507cb877f459e52dda08b98..28070ada7f6031a0273c1c3f2fc040edfd236ea1 100644 (file)
--- a/drivers/media/platform/renesas/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/renesas/rcar-vin/rcar-core.c
@@ -340,24 +340,20 @@ static void rvin_group_notifier_cleanup(struct rvin_dev *vin)
 
 static int rvin_parallel_parse_of(struct rvin_dev *vin)
 {
-       struct fwnode_handle *ep, *fwnode;
+       struct fwnode_handle *fwnode __free(fwnode_handle) = NULL;
+       struct fwnode_handle *ep __free(fwnode_handle) = NULL;
        struct v4l2_fwnode_endpoint vep = {
                .bus_type = V4L2_MBUS_UNKNOWN,
        };
        struct v4l2_async_connection *asc;
-       int ret;
 
        ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(vin->dev), 0, 0, 0);
        if (!ep)
                return 0;
 
-       fwnode = fwnode_graph_get_remote_endpoint(ep);
-       ret = v4l2_fwnode_endpoint_parse(ep, &vep);
-       fwnode_handle_put(ep);
-       if (ret) {
-               vin_err(vin, "Failed to parse %pOF\n", to_of_node(fwnode));
-               ret = -EINVAL;
-               goto out;
+       if (v4l2_fwnode_endpoint_parse(ep, &vep)) {
+               vin_err(vin, "Failed to parse %pOF\n", to_of_node(ep));
+               return -EINVAL;
        }
 
        switch (vep.bus_type) {
@@ -371,24 +367,20 @@ static int rvin_parallel_parse_of(struct rvin_dev *vin)
                break;
        default:
                vin_err(vin, "Unknown media bus type\n");
-               ret = -EINVAL;
-               goto out;
+               return -EINVAL;
        }
 
+       fwnode = fwnode_graph_get_remote_endpoint(ep);
        asc = v4l2_async_nf_add_fwnode(&vin->notifier, fwnode,
                                       struct v4l2_async_connection);
-       if (IS_ERR(asc)) {
-               ret = PTR_ERR(asc);
-               goto out;
-       }
+       if (IS_ERR(asc))
+               return PTR_ERR(asc);
 
        vin->parallel.asc = asc;
 
        vin_dbg(vin, "Add parallel OF device %pOF\n", to_of_node(fwnode));
-out:
-       fwnode_handle_put(fwnode);
 
-       return ret;
+       return 0;
 }
 
 static int rvin_group_notifier_init(struct rvin_dev *vin, unsigned int port,