V4L/DVB (13557): v4l: Remove unneeded video_device::minor usage in drivers

The video_device::minor field is used where it shouldn't, either to

- test for error conditions that can't happen anymore with the current
  v4l-dvb core,
- store the value in a driver private field that isn't used anymore,
- check the video device type where video_device::vfl_type should be
  used, or
- create the name of a kernel thread that should get a stable name.

Remove or fix those use cases.

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

5 files changed, 8 insertions, 38 deletions

diff --git a/drivers/media/common/saa7146_fops.c b/drivers/media/common/saa7146_fops.c
index 3c11cff00475..7364b9642d00 100644
--- a/drivers/media/common/saa7146_fops.c
+++ b/drivers/media/common/saa7146_fops.c
@@ -1,7 +1,5 @@
 #include <media/saa7146_vv.h>
 
-#define BOARD_CAN_DO_VBI(dev)   (dev->revision != 0 && dev->vv_data->vbi_minor != -1)
-
 /****************************************************************************/
 /* resource management functions, shamelessly stolen from saa7134 driver */
 
@@ -455,9 +453,6 @@ int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
            configuration data) */
         dev->ext_vv_data = ext_vv;
 
-        vv->video_minor = -1;
-        vv->vbi_minor = -1;
-
         vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
         if( NULL == vv->d_clipping.cpu_addr ) {
                 ERR(("out of memory. aborting.\n"));
@@ -496,7 +491,6 @@ EXPORT_SYMBOL_GPL(saa7146_vv_release);
 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
                             char *name, int type)
 {
-        struct saa7146_vv *vv = dev->vv_data;
         struct video_device *vfd;
         int err;
         int i;
@@ -524,11 +518,6 @@ int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
                 return err;
         }
 
-        if (VFL_TYPE_GRABBER == type)
-                vv->video_minor = vfd->minor;
-        else
-                vv->vbi_minor = vfd->minor;
-
         INFO(("%s: registered device %s [v4l2]\n",
                 dev->name, video_device_node_name(vfd)));
 
@@ -539,16 +528,8 @@ EXPORT_SYMBOL_GPL(saa7146_register_device);
 
 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
 {
-        struct saa7146_vv *vv = dev->vv_data;
-
         DEB_EE(("dev:%p\n",dev));
 
-        if ((*vid)->vfl_type == VFL_TYPE_GRABBER) {
-                vv->video_minor = -1;
-        } else {
-                vv->vbi_minor = -1;
-        }
-
         video_unregister_device(*vid);
         *vid = NULL;
 
diff --git a/drivers/media/radio/radio-tea5764.c b/drivers/media/radio/radio-tea5764.c
index 730ffd9cdd3e..1d357b79b2fd 100644
--- a/drivers/media/radio/radio-tea5764.c
+++ b/drivers/media/radio/radio-tea5764.c
@@ -460,12 +460,8 @@ static int vidioc_s_audio(struct file *file, void *priv,
 static int tea5764_open(struct file *file)
 {
         /* Currently we support only one device */
-        int minor = video_devdata(file)->minor;
         struct tea5764_device *radio = video_drvdata(file);
 
-        if (radio->videodev->minor != minor)
-                return -ENODEV;
-
         mutex_lock(&radio->mutex);
         /* Only exclusive access */
         if (radio->users) {
diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index 410260a1c364..3182a406bdd1 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -3206,7 +3206,6 @@ err:
 
 static int bttv_open(struct file *file)
 {
-        int minor = video_devdata(file)->minor;
         struct video_device *vdev = video_devdata(file);
         struct bttv *btv = video_drvdata(file);
         struct bttv_fh *fh;
@@ -3214,17 +3213,17 @@ static int bttv_open(struct file *file)
 
         dprintk(KERN_DEBUG "bttv: open dev=%s\n", video_device_node_name(vdev));
 
-        lock_kernel();
-        if (btv->video_dev->minor == minor) {
+        if (vdev->vfl_type == VFL_TYPE_GRABBER) {
                 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-        } else if (btv->vbi_dev->minor == minor) {
+        } else if (vdev->vfl_type == VFL_TYPE_VBI) {
                 type = V4L2_BUF_TYPE_VBI_CAPTURE;
         } else {
                 WARN_ON(1);
-                unlock_kernel();
                 return -ENODEV;
         }
 
+        lock_kernel();
+
         dprintk(KERN_DEBUG "bttv%d: open called (type=%s)\n",
                 btv->c.nr,v4l2_type_names[type]);
 
@@ -3408,7 +3407,6 @@ static struct video_device bttv_video_template = {
 
 static int radio_open(struct file *file)
 {
-        int minor = video_devdata(file)->minor;
         struct video_device *vdev = video_devdata(file);
         struct bttv *btv = video_drvdata(file);
         struct bttv_fh *fh;
@@ -3416,11 +3414,6 @@ static int radio_open(struct file *file)
         dprintk("bttv: open dev=%s\n", video_device_node_name(vdev));
 
         lock_kernel();
-        WARN_ON(btv->radio_dev && btv->radio_dev->minor != minor);
-        if (!btv->radio_dev || btv->radio_dev->minor != minor) {
-                unlock_kernel();
-                return -ENODEV;
-        }
 
         dprintk("bttv%d: open called (radio)\n",btv->c.nr);
 
diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c
index b1944a7cbb0f..a3d8f4675c04 100644
--- a/drivers/media/video/gspca/sn9c20x.c
+++ b/drivers/media/video/gspca/sn9c20x.c
@@ -1476,8 +1476,9 @@ static int sn9c20x_input_init(struct gspca_dev *gspca_dev)
         if (input_register_device(sd->input_dev))
                 return -EINVAL;
 
-        sd->input_task = kthread_run(input_kthread, gspca_dev, "sn9c20x/%d",
-                                     gspca_dev->vdev.minor);
+        sd->input_task = kthread_run(input_kthread, gspca_dev, "sn9c20x/%s-%s",
+                                     gspca_dev->dev->bus->bus_name,
+                                     gspca_dev->dev->devpath);
 
         if (IS_ERR(sd->input_task))
                 return -EINVAL;
diff --git a/drivers/media/video/omap24xxcam.c b/drivers/media/video/omap24xxcam.c
index 71e08be7960c..7400eacb4d64 100644
--- a/drivers/media/video/omap24xxcam.c
+++ b/drivers/media/video/omap24xxcam.c
@@ -1450,12 +1450,11 @@ static int omap24xxcam_mmap(struct file *file, struct vm_area_struct *vma)
 
 static int omap24xxcam_open(struct file *file)
 {
-        int minor = video_devdata(file)->minor;
         struct omap24xxcam_device *cam = omap24xxcam.priv;
         struct omap24xxcam_fh *fh;
         struct v4l2_format format;
 
-        if (!cam || !cam->vfd || (cam->vfd->minor != minor))
+        if (!cam || !cam->vfd)
                 return -ENODEV;
 
         fh = kzalloc(sizeof(*fh), GFP_KERNEL);