diff options
Diffstat (limited to 'drivers/media/radio/radio-maestro.c')
| -rw-r--r-- | drivers/media/radio/radio-maestro.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c index 9ef0a763eeb..4bf4d007bcf 100644 --- a/drivers/media/radio/radio-maestro.c +++ b/drivers/media/radio/radio-maestro.c @@ -75,7 +75,21 @@ static struct v4l2_queryctrl radio_qctrl[] = { static int radio_nr = -1; module_param(radio_nr, int, 0); +static unsigned long in_use; + static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent); + +static int maestro_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &in_use) ? -EBUSY : 0; +} + +static int maestro_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &in_use); + return 0; +} + static void maestro_remove(struct pci_dev *pdev); static struct pci_device_id maestro_r_pci_tbl[] = { @@ -98,8 +112,8 @@ static struct pci_driver maestro_r_driver = { static const struct file_operations maestro_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = maestro_exclusive_open, + .release = maestro_exclusive_release, .ioctl = video_ioctl2, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, @@ -196,8 +210,7 @@ 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 radio_device *card = video_get_drvdata(dev); + struct radio_device *card = video_drvdata(file); if (v->index > 0) return -EINVAL; @@ -229,8 +242,7 @@ 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 radio_device *card = video_get_drvdata(dev); + struct radio_device *card = video_drvdata(file); if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) return -EINVAL; @@ -241,8 +253,7 @@ 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 radio_device *card = video_get_drvdata(dev); + struct radio_device *card = video_drvdata(file); f->type = V4L2_TUNER_RADIO; f->frequency = BITS2FREQ(radio_bits_get(card)); @@ -267,8 +278,7 @@ 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 radio_device *card = video_get_drvdata(dev); + struct radio_device *card = video_drvdata(file); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: @@ -281,8 +291,7 @@ 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 radio_device *card = video_get_drvdata(dev); + struct radio_device *card = video_drvdata(file); register u16 io = card->io; register u16 omask = inw(io + IO_MASK); @@ -374,6 +383,7 @@ static struct video_device maestro_radio = { .name = "Maestro radio", .fops = &maestro_fops, .ioctl_ops = &maestro_ioctl_ops, + .release = video_device_release, }; static int __devinit maestro_probe(struct pci_dev *pdev, |