V4L/DVB (8776): radio: replace video_exclusive_open/release

Move the video_exclusive_open/release functionality into the driver itself.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 15 insertions, 5 deletions

diff --git a/drivers/media/radio/radio-typhoon.c b/drivers/media/radio/radio-typhoon.c
index f8d62cfea774..878468507237 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;
@@ -334,10 +334,21 @@ 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,
@@ -447,8 +458,7 @@ static int __init typhoon_init(void)
         }
 
         typhoon_radio.priv = &typhoon_unit;
-        if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1)
-        {
+        if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
                 release_region(io, 8);
                 return -EINVAL;
         }