V4L/DVB (7399): Removes video_dev from tuner-xc2028 config struct

The video_dev parameter, on tuner-xc2028 were used to pass i2c private data to
tuner_callback. Since the driver already have a pointer to i2c_adap->algo_data,
uses this instead.

This parameter were used also as a magic number to idenfity if two drivers are
trying to register the same xc3028 tuner. This occurs with boards with DVB
support, where both DVB and V4L drivers will share the same tuner.

Instead of using the algo_data as a private number, after this patch, the
driver will use i2c_adap->dev, with seems more consistent.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

4 files changed, 12 insertions, 7 deletions

diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index 22381de7359e..5549a9d73a5c 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -297,7 +297,6 @@ static int dvb_register(struct cx23885_tsport *port)
 			struct xc2028_config cfg = {
 				.i2c_adap  = &i2c_bus->i2c_adap,
 				.i2c_addr  = 0x61,
-				.video_dev = port,
 				.callback  = cx23885_hvr1500_xc3028_callback,
 			};
 			static struct xc2028_ctrl ctl = {
diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index 37ebfcc6be55..bbbde6d7dab9 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -458,7 +458,6 @@ static int attach_xc3028(u8 addr, struct cx8802_dev *dev)
 	struct xc2028_config cfg = {
 		.i2c_adap  = &dev->core->i2c_adap,
 		.i2c_addr  = addr,
-		.video_dev = dev->core->i2c_adap.algo_data,
 	};
 
 	if (!dev->dvb.frontend) {
@@ -780,7 +779,6 @@ static int dvb_register(struct cx8802_dev *dev)
 			struct xc2028_config cfg = {
 				.i2c_adap  = &dev->core->i2c_adap,
 				.i2c_addr  = 0x61,
-				.video_dev = dev->core,
 				.callback  = cx88_pci_nano_callback,
 			};
 			static struct xc2028_ctrl ctl = {
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index 4b936b809d78..225e8f8df1a5 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -419,7 +419,6 @@ static void set_type(struct i2c_client *c, unsigned int type,
 		struct xc2028_config cfg = {
 			.i2c_adap  = t->i2c->adapter,
 			.i2c_addr  = t->i2c->addr,
-			.video_dev = c->adapter->algo_data,
 			.callback  = t->tuner_callback,
 		};
 		if (!xc2028_attach(&t->fe, &cfg)) {
diff --git a/drivers/media/video/tuner-xc2028.c b/drivers/media/video/tuner-xc2028.c
index a9caae1af49d..0b5ba67a4da5 100644
--- a/drivers/media/video/tuner-xc2028.c
+++ b/drivers/media/video/tuner-xc2028.c
@@ -1155,7 +1155,7 @@ struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
 	if (debug)
 		printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
 
-	if (NULL == cfg || NULL == cfg->video_dev)
+	if (NULL == cfg)
 		return NULL;
 
 	if (!fe) {
@@ -1163,13 +1163,19 @@ struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
 		return NULL;
 	}
 
-	video_dev = cfg->video_dev;
+	video_dev = cfg->i2c_adap->algo_data;
+
+	if (debug)
+		printk(KERN_DEBUG "xc2028: video_dev =%p\n", video_dev);
 
 	mutex_lock(&xc2028_list_mutex);
 
 	list_for_each_entry(priv, &xc2028_list, xc2028_list) {
-		if (priv->video_dev == cfg->video_dev) {
+		if (&priv->i2c_props.adap->dev == &cfg->i2c_adap->dev) {
 			video_dev = NULL;
+			if (debug)
+				printk(KERN_DEBUG "xc2028: reusing device\n");
+
 			break;
 		}
 	}
@@ -1197,6 +1203,9 @@ struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
 	fe->tuner_priv = priv;
 	priv->count++;
 
+	if (debug)
+		printk(KERN_DEBUG "xc2028: usage count is %i\n", priv->count);
+
 	memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
 	       sizeof(xc2028_dvb_tuner_ops));