V4L/DVB (10497): saa7146: i2c adapdata now points to v4l2_device.

Prepare for converting to v4l2_subdev.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/saa7146_core.c

@@ -516,7 +516,7 @@ static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent
 static void saa7146_remove_one(struct pci_dev *pdev)
 {
 	struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
-	struct saa7146_dev *dev = container_of(v4l2_dev, struct saa7146_dev, v4l2_dev);
+	struct saa7146_dev *dev = to_saa7146_dev(v4l2_dev);
 	struct {
 		void *addr;
 		dma_addr_t dma;

drivers/media/common/saa7146_i2c.c

@@ -390,7 +390,8 @@ static int saa7146_i2c_transfer(struct saa7146_dev *dev, const struct i2c_msg *m
 /* utility functions */
 static int saa7146_i2c_xfer(struct i2c_adapter* adapter, struct i2c_msg *msg, int num)
 {
-	struct saa7146_dev* dev = i2c_get_adapdata(adapter);
+	struct v4l2_device *v4l2_dev = i2c_get_adapdata(adapter);
+	struct saa7146_dev *dev = to_saa7146_dev(v4l2_dev);
 
 	/* use helper function to transfer data */
 	return saa7146_i2c_transfer(dev, msg, num, adapter->retries);
@@ -419,7 +420,7 @@ int saa7146_i2c_adapter_prepare(struct saa7146_dev *dev, struct i2c_adapter *i2c
 
 	if( NULL != i2c_adapter ) {
 		BUG_ON(!i2c_adapter->class);
-		i2c_set_adapdata(i2c_adapter,dev);
+		i2c_set_adapdata(i2c_adapter, &dev->v4l2_dev);
 		i2c_adapter->dev.parent    = &dev->pci->dev;
 		i2c_adapter->algo	   = &saa7146_algo;
 		i2c_adapter->algo_data     = NULL;

include/media/saa7146.h

@@ -148,6 +148,11 @@ struct saa7146_dev
 	struct saa7146_dma		d_rps1;
 };
 
+static inline struct saa7146_dev *to_saa7146_dev(struct v4l2_device *v4l2_dev)
+{
+	return container_of(v4l2_dev, struct saa7146_dev, v4l2_dev);
+}
+
 /* from saa7146_i2c.c */
 int saa7146_i2c_adapter_prepare(struct saa7146_dev *dev, struct i2c_adapter *i2c_adapter, u32 bitrate);