diff options
Diffstat (limited to 'drivers/media/radio/radio-typhoon.c')
| -rw-r--r-- | drivers/media/radio/radio-typhoon.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/drivers/media/radio/radio-typhoon.c b/drivers/media/radio/radio-typhoon.c index f8d62cfea77..952ec35a841 100644 --- a/drivers/media/radio/radio-typhoon.c +++ b/drivers/media/radio/radio-typhoon.c @@ -79,7 +79,7 @@ static struct v4l2_queryctrl radio_qctrl[] = { #endif struct typhoon_device { - int users; + unsigned long in_use; int iobase; int curvol; int muted; @@ -223,8 +223,7 @@ 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 typhoon_device *typhoon = dev->priv; + struct typhoon_device *typhoon = video_drvdata(file); typhoon->curfreq = f->frequency; typhoon_setfreq(typhoon, typhoon->curfreq); @@ -234,8 +233,7 @@ 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 typhoon_device *typhoon = dev->priv; + struct typhoon_device *typhoon = video_drvdata(file); f->type = V4L2_TUNER_RADIO; f->frequency = typhoon->curfreq; @@ -261,8 +259,7 @@ 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 typhoon_device *typhoon = dev->priv; + struct typhoon_device *typhoon = video_drvdata(file); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: @@ -278,8 +275,7 @@ 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 typhoon_device *typhoon = dev->priv; + struct typhoon_device *typhoon = video_drvdata(file); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: @@ -334,10 +330,21 @@ static struct typhoon_device typhoon_unit = .mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ, }; +static int typhoon_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &typhoon_unit.in_use) ? -EBUSY : 0; +} + +static int typhoon_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &typhoon_unit.in_use); + return 0; +} + static const struct file_operations typhoon_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = typhoon_exclusive_open, + .release = typhoon_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, @@ -364,6 +371,7 @@ static struct video_device typhoon_radio = { .name = "Typhoon Radio", .fops = &typhoon_fops, .ioctl_ops = &typhoon_ioctl_ops, + .release = video_device_release_empty, }; #ifdef CONFIG_RADIO_TYPHOON_PROC_FS @@ -446,9 +454,8 @@ static int __init typhoon_init(void) return -EBUSY; } - typhoon_radio.priv = &typhoon_unit; - if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1) - { + video_set_drvdata(&typhoon_radio, &typhoon_unit); + if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) < 0) { release_region(io, 8); return -EINVAL; } |