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From:   Daniel Scally <djrscally@gmail.com>
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Subject: [PATCH 11/18] media: v4l2-core: v4l2-async: Check possible match in match_fwnode based on sd->fwnode->secondary
Date:   Mon, 30 Nov 2020 13:31:22 +0000
Message-Id: <20201130133129.1024662-12-djrscally@gmail.com>
In-Reply-To: <20201130133129.1024662-1-djrscally@gmail.com>
References: <20201130133129.1024662-1-djrscally@gmail.com>
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Where the fwnode graph is comprised of software_nodes, these will be
assigned as the secondary to dev->fwnode. Check the v4l2_subdev's fwnode
for a secondary and attempt to match against it during match_fwnode() to
accommodate that possibility.

Signed-off-by: Daniel Scally <djrscally@gmail.com>
---
Changes since RFC v3:

	- None

 drivers/media/v4l2-core/v4l2-async.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index e3ab003a6c85..6486dbde784f 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -87,6 +87,14 @@ static bool match_fwnode(struct v4l2_async_notifier *notifier,
 	if (sd->fwnode == asd->match.fwnode)
 		return true;
 
+	/*
+	 * Check the same situation for any possible secondary assigned to the
+	 * subdev's fwnode
+	 */
+	if ((!IS_ERR_OR_NULL(sd->fwnode->secondary)) &&
+	    sd->fwnode->secondary == asd->match.fwnode)
+		return true;
+
 	/*
 	 * Otherwise, check if the sd fwnode and the asd fwnode refer to an
 	 * endpoint or a device. If they're of the same type, there's no match.
-- 
2.25.1