[PATCH 05/13] media: st-mipid02: Use v4l2_async_notifier_add_fwnode_remote_subdev helpers

[Ezequiel Garcia <ezequiel@collabora.com>]

The use of v4l2_async_notifier_add_subdev is discouraged.
Drivers are instead encouraged to use a helper such as
v4l2_async_notifier_add_fwnode_remote_subdev.

This fixes a misuse of the API, as v4l2_async_notifier_add_subdev
should get a kmalloc'ed struct v4l2_async_subdev,
removing some boilerplate code while at it.

Use the appropriate helper v4l2_async_notifier_add_fwnode_remote_subdev,
which handles the needed setup, instead of open-coding it.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
 drivers/media/i2c/st-mipid02.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
index 003ba22334cd..9e04ff02257c 100644
--- a/drivers/media/i2c/st-mipid02.c
+++ b/drivers/media/i2c/st-mipid02.c
@@ -92,7 +92,6 @@ struct mipid02_dev {
 	u64 link_frequency;
 	struct v4l2_fwnode_endpoint tx;
 	/* remote source */
-	struct v4l2_async_subdev asd;
 	struct v4l2_async_notifier notifier;
 	struct v4l2_subdev *s_subdev;
 	/* registers */
@@ -844,6 +843,7 @@ static int mipid02_parse_rx_ep(struct mipid02_dev *bridge)
 {
 	struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY };
 	struct i2c_client *client = bridge->i2c_client;
+	struct v4l2_async_subdev *asd;
 	struct device_node *ep_node;
 	int ret;
 
@@ -875,17 +875,17 @@ static int mipid02_parse_rx_ep(struct mipid02_dev *bridge)
 	bridge->rx = ep;
 
 	/* register async notifier so we get noticed when sensor is connected */
-	bridge->asd.match.fwnode =
-		fwnode_graph_get_remote_port_parent(of_fwnode_handle(ep_node));
-	bridge->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
+	v4l2_async_notifier_init(&bridge->notifier);
+	asd = v4l2_async_notifier_add_fwnode_remote_subdev(
+					&bridge->notifier,
+					of_fwnode_handle(ep_node),
+					sizeof(*asd));
 	of_node_put(ep_node);
 
-	v4l2_async_notifier_init(&bridge->notifier);
-	ret = v4l2_async_notifier_add_subdev(&bridge->notifier, &bridge->asd);
-	if (ret) {
+	if (IS_ERR(asd)) {
+		ret = PTR_ERR(asd);
 		dev_err(&client->dev, "fail to register asd to notifier %d",
 			ret);
-		fwnode_handle_put(bridge->asd.match.fwnode);
 		return ret;
 	}
 	bridge->notifier.ops = &mipid02_notifier_ops;
-- 
2.29.2