V4L/DVB (10060): dsbr100: fix and add right comments

[linux-2.6-omap-h63xx.git] / drivers / media / radio / radio-gemtek.c

diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c
index 0a0f956bb308387dc7c9334f150bef5b855448b9..e13118da307bb313eab757c9cead6046c59aa2ee 100644 (file)
--- a/drivers/media/radio/radio-gemtek.c
+++ b/drivers/media/radio/radio-gemtek.c
@@ -8,7 +8,7 @@
  *    RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
  *
  *    Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
- *    Converted to new API by Alan Cox <Alan.Cox@linux.org>
+ *    Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
  *    Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
  *
  * TODO: Allow for more than one of these foolish entities :-)
@@ -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,
 };
 
 /*
@@ -610,7 +619,7 @@ 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) < 0) {
                release_region(io, 1);