diff options
Diffstat (limited to 'drivers/media/video/v4l2-dev.c')
| -rw-r--r-- | drivers/media/video/v4l2-dev.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 556615fe93d..155fdec9ac7 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -222,11 +222,13 @@ int video_register_device(struct video_device *vfd, int type, int nr) EXPORT_SYMBOL(video_register_device); /** - * video_register_device - register video4linux devices + * video_register_device_index - register video4linux devices * @vfd: video device structure we want to register * @type: type of device to register * @nr: which device number (0 == /dev/video0, 1 == /dev/video1, ... * -1 == first free) + * @index: stream number based on parent device; + * -1 if auto assign, requested number otherwise * * The registration code assigns minor numbers based on the type * requested. -ENFILE is returned in all the device slots for this @@ -255,6 +257,9 @@ int video_register_device_index(struct video_device *vfd, int type, int nr, int ret; char *name_base; + if (vfd == NULL) + return -EINVAL; + switch (type) { case VFL_TYPE_GRABBER: base = MINOR_VFL_TYPE_GRABBER_MIN; @@ -279,7 +284,7 @@ int video_register_device_index(struct video_device *vfd, int type, int nr, default: printk(KERN_ERR "%s called with unknown type: %d\n", __func__, type); - return -1; + return -EINVAL; } /* pick a minor number */ |