diff options
Diffstat (limited to 'drivers/media/radio/radio-rtrack2.c')
| -rw-r--r-- | drivers/media/radio/radio-rtrack2.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/drivers/media/radio/radio-rtrack2.c b/drivers/media/radio/radio-rtrack2.c index e2dde080726..a6707977741 100644 --- a/drivers/media/radio/radio-rtrack2.c +++ b/drivers/media/radio/radio-rtrack2.c @@ -52,6 +52,7 @@ static spinlock_t lock; struct rt_device { + unsigned long in_use; int port; unsigned long curfreq; int muted; @@ -153,8 +154,7 @@ static int rt_getsigstr(struct rt_device *dev) static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { - struct video_device *dev = video_devdata(file); - struct rt_device *rt = dev->priv; + struct rt_device *rt = video_drvdata(file); if (v->index > 0) return -EINVAL; @@ -173,8 +173,7 @@ static int vidioc_g_tuner(struct file *file, void *priv, static int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { - struct video_device *dev = video_devdata(file); - struct rt_device *rt = dev->priv; + struct rt_device *rt = video_drvdata(file); rt->curfreq = f->frequency; rt_setfreq(rt, rt->curfreq); @@ -184,8 +183,7 @@ static int vidioc_s_frequency(struct file *file, void *priv, static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { - struct video_device *dev = video_devdata(file); - struct rt_device *rt = dev->priv; + struct rt_device *rt = video_drvdata(file); f->type = V4L2_TUNER_RADIO; f->frequency = rt->curfreq; @@ -210,8 +208,7 @@ static int vidioc_queryctrl(struct file *file, void *priv, static int vidioc_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { - struct video_device *dev = video_devdata(file); - struct rt_device *rt = dev->priv; + struct rt_device *rt = video_drvdata(file); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: @@ -230,8 +227,7 @@ static int vidioc_g_ctrl(struct file *file, void *priv, static int vidioc_s_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl) { - struct video_device *dev = video_devdata(file); - struct rt_device *rt = dev->priv; + struct rt_device *rt = video_drvdata(file); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: @@ -284,10 +280,21 @@ static int vidioc_s_audio(struct file *file, void *priv, static struct rt_device rtrack2_unit; +static int rtrack2_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &rtrack2_unit.in_use) ? -EBUSY : 0; +} + +static int rtrack2_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &rtrack2_unit.in_use); + return 0; +} + static const struct file_operations rtrack2_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = rtrack2_exclusive_open, + .release = rtrack2_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, @@ -314,6 +321,7 @@ static struct video_device rtrack2_radio = { .name = "RadioTrack II radio", .fops = &rtrack2_fops, .ioctl_ops = &rtrack2_ioctl_ops, + .release = video_device_release_empty, }; static int __init rtrack2_init(void) @@ -329,11 +337,10 @@ static int __init rtrack2_init(void) return -EBUSY; } - rtrack2_radio.priv=&rtrack2_unit; + video_set_drvdata(&rtrack2_radio, &rtrack2_unit); spin_lock_init(&lock); - if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1) - { + if (video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr) < 0) { release_region(io, 4); return -EINVAL; } |