diff options
Diffstat (limited to 'linux/drivers/media/radio/radio-trust.c')
| -rw-r--r-- | linux/drivers/media/radio/radio-trust.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/linux/drivers/media/radio/radio-trust.c b/linux/drivers/media/radio/radio-trust.c index 648007027..a334ce27e 100644 --- a/linux/drivers/media/radio/radio-trust.c +++ b/linux/drivers/media/radio/radio-trust.c @@ -79,6 +79,7 @@ static __u16 curtreble; static unsigned long curfreq; static int curstereo; static int curmute; +static unsigned long in_use; /* i2c addresses */ #define TDA7318_ADDR 0x88 @@ -340,10 +341,21 @@ static int vidioc_s_audio(struct file *file, void *priv, return 0; } +static int trust_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &in_use) ? -EBUSY : 0; +} + +static int trust_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &in_use); + return 0; +} + static const struct file_operations trust_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = trust_exclusive_open, + .release = trust_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, @@ -370,6 +382,7 @@ static struct video_device trust_radio = { .name = "Trust FM Radio", .fops = &trust_fops, .ioctl_ops = &trust_ioctl_ops, + .release = video_device_release_empty, }; static int __init trust_init(void) @@ -382,8 +395,7 @@ static int __init trust_init(void) printk(KERN_ERR "trust: port 0x%x already in use\n", io); return -EBUSY; } - if(video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr)==-1) - { + if (video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr) < 0) { release_region(io, 2); return -EINVAL; } |