V4L/DVB (13554a): v4l: Use the video_drvdata function in drivers

Fix all device drivers to use the video_drvdata function instead of
maintaining a local list of minor to private data mappings. Call
video_set_drvdata to register the driver private pointer when not
already done.

Where applicable, the local list of mappings is completely removed when
it becomes unused.

[mchehab.redhat.com: patch broke into two. This one changes just tm6000]
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/tm6000/tm6000-cards.c

@@ -791,7 +791,6 @@ static int tm6000_usb_probe(struct usb_interface *interface,
 	if ((card[nr] >= 0) && (card[nr] < ARRAY_SIZE(tm6000_boards)))
 		dev->model = card[nr];
 
-	INIT_LIST_HEAD(&dev->tm6000_corelist);
 	dev->udev = usbdev;
 	dev->devno = nr;
 

drivers/staging/tm6000/tm6000-video.c

@@ -116,8 +116,6 @@ static struct tm6000_fmt format[] = {
 	}
 };
 
-static LIST_HEAD(tm6000_corelist);
-
 /* ------------------------------------------------------------------
 	DMA and thread functions
    ------------------------------------------------------------------*/
@@ -1321,8 +1319,7 @@ static int tm6000_open(struct file *file)
 	struct video_device *vdev = video_devdata(file);
 	struct tm6000_core *dev = video_drvdata(file);
 	struct tm6000_fh *fh;
-	struct list_head *list;
-	enum v4l2_buf_type type = 0;
+	enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 	int i,rc;
 
 	printk(KERN_INFO "tm6000: open called (dev=%s)\n",
@@ -1331,16 +1328,6 @@ static int tm6000_open(struct file *file)
 	dprintk(dev, V4L2_DEBUG_OPEN, "tm6000: open called (dev=%s)\n",
 		video_device_node_name(vdev));
 
-	list_for_each(list,&tm6000_corelist) {
-		h = list_entry(list, struct tm6000_core, tm6000_corelist);
-		if (h->vfd->minor == minor) {
-			dev  = h;
-			type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		}
-	}
-	if (NULL == dev)
-		return -ENODEV;
-
 
 	/* If more than one user, mutex should be added */
 	dev->users++;
@@ -1533,8 +1520,6 @@ int tm6000_v4l2_register(struct tm6000_core *dev)
 	}
 	dev->vfd = vfd;
 
-	list_add_tail(&dev->tm6000_corelist,&tm6000_corelist);
-
 	/* init video dma queues */
 	INIT_LIST_HEAD(&dev->vidq.active);
 	INIT_LIST_HEAD(&dev->vidq.queued);
@@ -1542,6 +1527,7 @@ int tm6000_v4l2_register(struct tm6000_core *dev)
 	memcpy (dev->vfd, &tm6000_template, sizeof(*(dev->vfd)));
 	dev->vfd->debug=tm6000_debug;
 	vfd->v4l2_dev = &dev->v4l2_dev;
+	video_set_drvdata(vfd, dev);
 
 	ret = video_register_device(dev->vfd, VFL_TYPE_GRABBER, video_nr);
 	printk(KERN_INFO "Trident TVMaster TM5600/TM6000/TM6010 USB2 board (Load status: %d)\n", ret);
@@ -1550,18 +1536,8 @@ int tm6000_v4l2_register(struct tm6000_core *dev)
 
 int tm6000_v4l2_unregister(struct tm6000_core *dev)
 {
-	struct tm6000_core *h;
-	struct list_head *pos, *tmp;
-
 	video_unregister_device(dev->vfd);
 
-	list_for_each_safe(pos, tmp, &tm6000_corelist) {
-		h = list_entry(pos, struct tm6000_core, tm6000_corelist);
-		if (h == dev) {
-			list_del(pos);
-		}
-	}
-
 	return 0;
 }
 

drivers/staging/tm6000/tm6000.h

@@ -169,7 +169,6 @@ struct tm6000_core {
 	struct i2c_client		i2c_client;
 
 	/* video for linux */
-	struct list_head		tm6000_corelist;
 	int				users;
 
 	/* various device info */