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linux-sg2042
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[PATCH] V4L: Fixes maximum number of VBI devices 

- Increases the minor number limitation for vbi devices from 223 to 255.
  This is in agreement with the minor number allocation specified in
  Documentation/devices.txt.

- Without this patch it is not possible to use more than 5 Hauppauge
  WinTV-PVR 350 cards since each of these allocate 3 vbi devices.

Signed-of-by: Sigmund Augdal Helberg <sigmund@snap.tv>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Sigmund Augdal Helberg 2005-12-01 00:51:19 -08:00 committed by Linus Torvalds
parent db1d1d57e9
commit 938606b02b
1 changed files with 13 additions and 13 deletions
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26
drivers/media/video/videodev.c
View File

@ -76,14 +76,14 @@ static void video_release(struct class_device *cd)
} }
static struct class video_class = { static struct class video_class = {
.name = VIDEO_NAME, .name = VIDEO_NAME,
.release = video_release, .release = video_release,
}; };
/* /*
* Active devices * Active devices
*/ */
static struct video_device *video_device[VIDEO_NUM_DEVICES]; static struct video_device *video_device[VIDEO_NUM_DEVICES];
static DECLARE_MUTEX(videodev_lock); static DECLARE_MUTEX(videodev_lock);
@ -101,7 +101,7 @@ static int video_open(struct inode *inode, struct file *file)
int err = 0; int err = 0;
struct video_device *vfl; struct video_device *vfl;
struct file_operations *old_fops; struct file_operations *old_fops;
if(minor>=VIDEO_NUM_DEVICES) if(minor>=VIDEO_NUM_DEVICES)
return -ENODEV; return -ENODEV;
down(&videodev_lock); down(&videodev_lock);
@ -189,7 +189,7 @@ video_usercopy(struct inode *inode, struct file *file,
return -ENOMEM; return -ENOMEM;
parg = mbuf; parg = mbuf;
} }
err = -EFAULT; err = -EFAULT;
if (_IOC_DIR(cmd) & _IOC_WRITE) if (_IOC_DIR(cmd) & _IOC_WRITE)
if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
@ -240,7 +240,7 @@ int video_exclusive_open(struct inode *inode, struct file *file)
int video_exclusive_release(struct inode *inode, struct file *file) int video_exclusive_release(struct inode *inode, struct file *file)
{ {
struct video_device *vfl = video_devdata(file); struct video_device *vfl = video_devdata(file);
vfl->users--; vfl->users--;
return 0; return 0;
} }
@ -253,7 +253,7 @@ static struct file_operations video_fops;
* @type: type of device to register * @type: type of device to register
* @nr: which device number (0 == /dev/video0, 1 == /dev/video1, ... * @nr: which device number (0 == /dev/video0, 1 == /dev/video1, ...
* -1 == first free) * -1 == first free)
* *
* The registration code assigns minor numbers based on the type * The registration code assigns minor numbers based on the type
* requested. -ENFILE is returned in all the device slots for this * requested. -ENFILE is returned in all the device slots for this
* category are full. If not then the minor field is set and the * category are full. If not then the minor field is set and the
@ -269,7 +269,7 @@ static struct file_operations video_fops;
* *
* %VFL_TYPE_VBI - Vertical blank data (undecoded) * %VFL_TYPE_VBI - Vertical blank data (undecoded)
* *
* %VFL_TYPE_RADIO - A radio card * %VFL_TYPE_RADIO - A radio card
*/ */
int video_register_device(struct video_device *vfd, int type, int nr) int video_register_device(struct video_device *vfd, int type, int nr)
@ -278,7 +278,7 @@ int video_register_device(struct video_device *vfd, int type, int nr)
int base; int base;
int end; int end;
char *name_base; char *name_base;
switch(type) switch(type)
{ {
case VFL_TYPE_GRABBER: case VFL_TYPE_GRABBER:
@ -293,7 +293,7 @@ int video_register_device(struct video_device *vfd, int type, int nr)
break; break;
case VFL_TYPE_VBI: case VFL_TYPE_VBI:
base=224; base=224;
end=240; end=256;
name_base = "vbi"; name_base = "vbi";
break; break;
case VFL_TYPE_RADIO: case VFL_TYPE_RADIO:
@ -334,7 +334,7 @@ int video_register_device(struct video_device *vfd, int type, int nr)
init_MUTEX(&vfd->lock); init_MUTEX(&vfd->lock);
/* sysfs class */ /* sysfs class */
memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev)); memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
if (vfd->dev) if (vfd->dev)
vfd->class_dev.dev = vfd->dev; vfd->class_dev.dev = vfd->dev;
vfd->class_dev.class = &video_class; vfd->class_dev.class = &video_class;
@ -360,7 +360,7 @@ int video_register_device(struct video_device *vfd, int type, int nr)
* This unregisters the passed device and deassigns the minor * This unregisters the passed device and deassigns the minor
* number. Future open calls will be met with errors. * number. Future open calls will be met with errors.
*/ */
void video_unregister_device(struct video_device *vfd) void video_unregister_device(struct video_device *vfd)
{ {
down(&videodev_lock); down(&videodev_lock);
@ -384,7 +384,7 @@ static struct file_operations video_fops=
/* /*
* Initialise video for linux * Initialise video for linux
*/ */
static int __init videodev_init(void) static int __init videodev_init(void)
{ {
int ret; int ret;