diff options
Diffstat (limited to 'linux/drivers/media/radio/radio-aimslab.c')
| -rw-r--r-- | linux/drivers/media/radio/radio-aimslab.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/linux/drivers/media/radio/radio-aimslab.c b/linux/drivers/media/radio/radio-aimslab.c index 516677a98..483ada689 100644 --- a/linux/drivers/media/radio/radio-aimslab.c +++ b/linux/drivers/media/radio/radio-aimslab.c @@ -52,6 +52,7 @@ static struct mutex lock; struct rt_device { + unsigned long in_use; int port; int curvol; unsigned long curfreq; @@ -246,8 +247,7 @@ static int vidioc_querycap(struct file *file, void *priv, 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; @@ -274,8 +274,7 @@ static int vidioc_s_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); @@ -285,8 +284,7 @@ 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; @@ -311,8 +309,7 @@ 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: @@ -328,8 +325,7 @@ 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: @@ -379,10 +375,21 @@ static int vidioc_s_audio(struct file *file, void *priv, static struct rt_device rtrack_unit; +static int rtrack_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &rtrack_unit.in_use) ? -EBUSY : 0; +} + +static int rtrack_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &rtrack_unit.in_use); + return 0; +} + static const struct file_operations rtrack_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = rtrack_exclusive_open, + .release = rtrack_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, @@ -409,6 +416,7 @@ static struct video_device rtrack_radio = { .name = "RadioTrack radio", .fops = &rtrack_fops, .ioctl_ops = &rtrack_ioctl_ops, + .release = video_device_release_empty, }; static int __init rtrack_init(void) @@ -425,10 +433,9 @@ static int __init rtrack_init(void) return -EBUSY; } - rtrack_radio.priv=&rtrack_unit; + video_set_drvdata(&rtrack_radio, &rtrack_unit); - if(video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr)==-1) - { + if (video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr) < 0) { release_region(io, 2); return -EINVAL; } |