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path: root/drivers/media/radio/radio-gemtek.c
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Diffstat (limited to 'drivers/media/radio/radio-gemtek.c')
-rw-r--r--drivers/media/radio/radio-gemtek.c40
1 files changed, 24 insertions, 16 deletions
diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c
index 2b1a6221de6..d131a5d3812 100644
--- a/drivers/media/radio/radio-gemtek.c
+++ b/drivers/media/radio/radio-gemtek.c
@@ -57,6 +57,7 @@ static int shutdown = 1;
static int keepmuted = 1;
static int initmute = 1;
static int radio_nr = -1;
+static unsigned long in_use;
module_param(io, int, 0444);
MODULE_PARM_DESC(io, "Force I/O port for the GemTek Radio card if automatic "
@@ -393,10 +394,21 @@ static struct v4l2_queryctrl radio_qctrl[] = {
}
};
+static int gemtek_exclusive_open(struct inode *inode, struct file *file)
+{
+ return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int gemtek_exclusive_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &in_use);
+ return 0;
+}
+
static const struct file_operations gemtek_fops = {
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = gemtek_exclusive_open,
+ .release = gemtek_exclusive_release,
.ioctl = video_ioctl2,
#ifdef CONFIG_COMPAT
.compat_ioctl = v4l_compat_ioctl32,
@@ -447,8 +459,7 @@ static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
- struct video_device *dev = video_devdata(file);
- struct gemtek_device *rt = dev->priv;
+ struct gemtek_device *rt = video_drvdata(file);
gemtek_setfreq(rt, f->frequency);
@@ -458,8 +469,7 @@ 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 gemtek_device *rt = dev->priv;
+ struct gemtek_device *rt = video_drvdata(file);
f->type = V4L2_TUNER_RADIO;
f->frequency = rt->lastfreq;
@@ -483,8 +493,7 @@ 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 gemtek_device *rt = dev->priv;
+ struct gemtek_device *rt = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
@@ -503,8 +512,7 @@ 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 gemtek_device *rt = dev->priv;
+ struct gemtek_device *rt = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
@@ -569,9 +577,10 @@ static const struct v4l2_ioctl_ops gemtek_ioctl_ops = {
};
static struct video_device gemtek_radio = {
- .name = "GemTek Radio card",
- .fops = &gemtek_fops,
- .ioctl_ops = &gemtek_ioctl_ops,
+ .name = "GemTek Radio card",
+ .fops = &gemtek_fops,
+ .ioctl_ops = &gemtek_ioctl_ops,
+ .release = video_device_release_empty,
};
/*
@@ -610,10 +619,9 @@ static int __init gemtek_init(void)
return -EINVAL;
}
- gemtek_radio.priv = &gemtek_unit;
+ video_set_drvdata(&gemtek_radio, &gemtek_unit);
- if (video_register_device(&gemtek_radio, VFL_TYPE_RADIO,
- radio_nr) == -1) {
+ if (video_register_device(&gemtek_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
release_region(io, 1);
return -EBUSY;
}