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path: root/drivers/media/radio/radio-typhoon.c
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Diffstat (limited to 'drivers/media/radio/radio-typhoon.c')
-rw-r--r--drivers/media/radio/radio-typhoon.c35
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;
}