linux-kernel - [PATCH] v4l2: mc: fix endpoint iteration

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Message-ID: <20241122145525.194253-1-demonsingur@gmail.com>
Date: Fri, 22 Nov 2024 16:55:24 +0200
From: Cosmin Tanislav <demonsingur@...il.com>
To: 
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Cosmin Tanislav <demonsingur@...il.com>,
	Hans Verkuil <hverkuil@...all.nl>,
	Steve Longerbeam <slongerbeam@...il.com>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] v4l2: mc: fix endpoint iteration

When creating links from a subdev to a sink, the current logic tries to
iterate over the endpoints of dev's fwnode.

This might not be correct when the subdev uses a different fwnode
compared to the dev's fwnode.

If, when registering, the subdev's fwnode is not set, the code inside
v4l2_async_register_subdev will set it to the dev's fwnode.

To fix this, just use the subdev's fwnode.

Signed-off-by: Cosmin Tanislav <demonsingur@...il.com>
Fixes: 0d3c81e82da9 ("media: v4l2-mc: add v4l2_create_fwnode_links helpers")
---
 drivers/media/v4l2-core/v4l2-mc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-mc.c b/drivers/media/v4l2-core/v4l2-mc.c
index 4bb91359e3a9a..937d358697e19 100644
--- a/drivers/media/v4l2-core/v4l2-mc.c
+++ b/drivers/media/v4l2-core/v4l2-mc.c
@@ -329,7 +329,7 @@ int v4l2_create_fwnode_links_to_pad(struct v4l2_subdev *src_sd,
 	if (!(sink->flags & MEDIA_PAD_FL_SINK))
 		return -EINVAL;
 
-	fwnode_graph_for_each_endpoint(dev_fwnode(src_sd->dev), endpoint) {
+	fwnode_graph_for_each_endpoint(src_sd->fwnode, endpoint) {
 		struct fwnode_handle *remote_ep;
 		int src_idx, sink_idx, ret;
 		struct media_pad *src;
-- 
2.47.0