V4L/DVB (6753): Fix vivi to support non-zero minor node

There were a trouble at vivi driver when using non-zero inodes. This where due
to not properly preserving the minor inode after calling video_register. Since
this driver is a reference for newer drivers, and it is possible to have more
than one video device inside the machine, this patch makes vivi to dynamically
allocate video_device struct.

Thanks to Gregor Jasny <jasny@vidsoft.de> for pointing the issue.

Also, this patch removes a very anoying (but useless) message of not having a
proper release call.

CC: Gregor Jasny <jasny@vidsoft.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 32 insertions, 8 deletions

diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
index fe9784a0cc21..5ddaaa370cbc 100644
--- a/drivers/media/video/vivi.c
+++ b/drivers/media/video/vivi.c
@@ -170,7 +170,7 @@ struct vivi_dev {
         int                        users;
 
         /* various device info */
-        struct video_device        vfd;
+        struct video_device        *vfd;
 
         struct vivi_dmaqueue       vidq;
 
@@ -986,7 +986,7 @@ static int vivi_open(struct inode *inode, struct file *file)
         printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
 
         list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
-                if (dev->vfd.minor == minor)
+                if (dev->vfd->minor == minor)
                         goto found;
         return -ENODEV;
 found:
@@ -1067,7 +1067,7 @@ vivi_poll(struct file *file, struct poll_table_struct *wait)
         return videobuf_poll_stream(file, q, wait);
 }
 
-static int vivi_release(struct inode *inode, struct file *file)
+static int vivi_close(struct inode *inode, struct file *file)
 {
         struct vivi_fh         *fh = file->private_data;
         struct vivi_dev *dev       = fh->dev;
@@ -1088,6 +1088,18 @@ static int vivi_release(struct inode *inode, struct file *file)
         return 0;
 }
 
+static int vivi_release(struct vivi_dev *dev)
+{
+        if (-1 != dev->vfd->minor)
+                video_unregister_device(dev->vfd);
+        else
+                video_device_release(dev->vfd);
+
+        dev->vfd = NULL;
+
+        return 0;
+}
+
 static int
 vivi_mmap(struct file *file, struct vm_area_struct * vma)
 {
@@ -1109,7 +1121,7 @@ vivi_mmap(struct file *file, struct vm_area_struct * vma)
 static const struct file_operations vivi_fops = {
         .owner          = THIS_MODULE,
         .open           = vivi_open,
-        .release        = vivi_release,
+        .release        = vivi_close,
         .read           = vivi_read,
         .poll           = vivi_poll,
         .ioctl          = video_ioctl2, /* V4L2 ioctl handler */
@@ -1117,12 +1129,12 @@ static const struct file_operations vivi_fops = {
         .llseek         = no_llseek,
 };
 
-static struct video_device vivi = {
+static struct video_device vivi_template = {
         .name           = "vivi",
         .type           = VID_TYPE_CAPTURE,
         .fops           = &vivi_fops,
         .minor          = -1,
-//      .release        = video_device_release,
+        .release        = video_device_release,
 
         .vidioc_querycap      = vidioc_querycap,
         .vidioc_enum_fmt_cap  = vidioc_enum_fmt_cap,
@@ -1156,6 +1168,7 @@ static int __init vivi_init(void)
 {
         int ret;
         struct vivi_dev *dev;
+        struct video_device *vfd;
 
         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
         if (NULL == dev)
@@ -1174,7 +1187,18 @@ static int __init vivi_init(void)
         dev->vidq.timeout.data     = (unsigned long)dev;
         init_timer(&dev->vidq.timeout);
 
-        ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
+        vfd = video_device_alloc();
+        if (NULL == vfd)
+                return -ENOMEM;
+
+        *vfd = vivi_template;
+
+        ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
+        snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
+                 vivi_template.name, vfd->minor);
+
+        dev->vfd = vfd;
+
         printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
         return ret;
 }
@@ -1188,9 +1212,9 @@ static void __exit vivi_exit(void)
                 list = vivi_devlist.next;
                 list_del(list);
                 h = list_entry(list, struct vivi_dev, vivi_devlist);
+                vivi_release(h);
                 kfree (h);
         }
-        video_unregister_device(&vivi);
 }
 
 module_init(vivi_init);