linux-kernel - [PATCH/RFC v8 04/14] v4l2-async: change custom.match callback argument type

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Date:	Fri, 28 Nov 2014 10:17:56 +0100
From:	Jacek Anaszewski <j.anaszewski@...sung.com>
To:	linux-leds@...r.kernel.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	kyungmin.park@...sung.com, b.zolnierkie@...sung.com, pavel@....cz,
	cooloney@...il.com, rpurdie@...ys.net, sakari.ailus@....fi,
	s.nawrocki@...sung.com,
	Jacek Anaszewski <j.anaszewski@...sung.com>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Hans Verkuil <hans.verkuil@...co.com>
Subject: [PATCH/RFC v8 04/14] v4l2-async: change custom.match callback argument
 type

It is useful to have an access to the async sub-device
being matched, not only to the related struct device.
Change match callback argument from struct device
to struct v4l2_subdev. It will allow e.g. for matching
a sub-device by its "name" property.

Signed-off-by: Jacek Anaszewski <j.anaszewski@...sung.com>
Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Hans Verkuil <hans.verkuil@...co.com>
---
 drivers/media/v4l2-core/v4l2-async.c |   16 ++++++++--------
 include/media/v4l2-async.h           |    2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index 85a6a34..8140992 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -22,10 +22,10 @@
 #include <media/v4l2-device.h>
 #include <media/v4l2-subdev.h>
 
-static bool match_i2c(struct device *dev, struct v4l2_async_subdev *asd)
+static bool match_i2c(struct v4l2_subdev *sd, struct v4l2_async_subdev *asd)
 {
 #if IS_ENABLED(CONFIG_I2C)
-	struct i2c_client *client = i2c_verify_client(dev);
+	struct i2c_client *client = i2c_verify_client(sd->dev);
 	return client &&
 		asd->match.i2c.adapter_id == client->adapter->nr &&
 		asd->match.i2c.address == client->addr;
@@ -34,14 +34,14 @@ static bool match_i2c(struct device *dev, struct v4l2_async_subdev *asd)
 #endif
 }
 
-static bool match_devname(struct device *dev, struct v4l2_async_subdev *asd)
+static bool match_devname(struct v4l2_subdev *sd, struct v4l2_async_subdev *asd)
 {
-	return !strcmp(asd->match.device_name.name, dev_name(dev));
+	return !strcmp(asd->match.device_name.name, dev_name(sd->dev));
 }
 
-static bool match_of(struct device *dev, struct v4l2_async_subdev *asd)
+static bool match_of(struct v4l2_subdev *sd, struct v4l2_async_subdev *asd)
 {
-	return dev->of_node == asd->match.of.node;
+	return sd->dev->of_node == asd->match.of.node;
 }
 
 static LIST_HEAD(subdev_list);
@@ -52,7 +52,7 @@ static struct v4l2_async_subdev *v4l2_async_belongs(struct v4l2_async_notifier *
 						    struct v4l2_subdev *sd)
 {
 	struct v4l2_async_subdev *asd;
-	bool (*match)(struct device *, struct v4l2_async_subdev *);
+	bool (*match)(struct v4l2_subdev *, struct v4l2_async_subdev *);
 
 	list_for_each_entry(asd, &notifier->waiting, list) {
 		/* bus_type has been verified valid before */
@@ -79,7 +79,7 @@ static struct v4l2_async_subdev *v4l2_async_belongs(struct v4l2_async_notifier *
 		}
 
 		/* match cannot be NULL here */
-		if (match(sd->dev, asd))
+		if (match(sd, asd))
 			return asd;
 	}
 
diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
index 7683569..1c0b586 100644
--- a/include/media/v4l2-async.h
+++ b/include/media/v4l2-async.h
@@ -51,7 +51,7 @@ struct v4l2_async_subdev {
 			unsigned short address;
 		} i2c;
 		struct {
-			bool (*match)(struct device *,
+			bool (*match)(struct v4l2_subdev *,
 				      struct v4l2_async_subdev *);
 			void *priv;
 		} custom;
-- 
1.7.9.5

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