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: removed tm6000 changes as tm6000 is not ready yet for submission even on staging]

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 12 deletions

diff --git a/drivers/media/video/cx88/cx88-blackbird.c b/drivers/media/video/cx88/cx88-blackbird.c
index 5186f87b4ece..f0ef94150d1e 100644
--- a/drivers/media/video/cx88/cx88-blackbird.c
+++ b/drivers/media/video/cx88/cx88-blackbird.c
@@ -1049,20 +1049,14 @@ static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *id)
 static int mpeg_open(struct file *file)
 {
         int minor = video_devdata(file)->minor;
-        struct cx8802_dev *dev = NULL;
+        struct cx8802_dev *dev = video_drvdata(file);
         struct cx8802_fh *fh;
         struct cx8802_driver *drv = NULL;
         int err;
 
-        lock_kernel();
-        dev = cx8802_get_device(minor);
-
         dprintk( 1, "%s\n", __func__);
 
-        if (dev == NULL) {
-                unlock_kernel();
-                return -ENODEV;
-        }
+        lock_kernel();
 
         /* Make sure we can acquire the hardware */
         drv = cx8802_get_driver(dev, CX88_MPEG_BLACKBIRD);
@@ -1129,10 +1123,6 @@ static int mpeg_release(struct file *file)
         kfree(fh);
 
         /* Make sure we release the hardware */
-        dev = cx8802_get_device(video_devdata(file)->minor);
-        if (dev == NULL)
-                return -ENODEV;
-
         drv = cx8802_get_driver(dev, CX88_MPEG_BLACKBIRD);
         if (drv)
                 drv->request_release(drv);
@@ -1290,6 +1280,7 @@ static int blackbird_register_video(struct cx8802_dev *dev)
 
         dev->mpeg_dev = cx88_vdev_init(dev->core,dev->pci,
                                        &cx8802_mpeg_template,"mpeg");
+        video_set_drvdata(dev->mpeg_dev, dev);
         err = video_register_device(dev->mpeg_dev,VFL_TYPE_GRABBER, -1);
         if (err < 0) {
                 printk(KERN_INFO "%s/2: can't register mpeg device\n",