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, 14 insertions, 2 deletions

diff --git a/drivers/media/radio/radio-maxiradio.c b/drivers/media/radio/radio-maxiradio.c
index 0cc6fcb041fd..263ef8b02fd8 100644
--- a/drivers/media/radio/radio-maxiradio.c
+++ b/drivers/media/radio/radio-maxiradio.c
@@ -85,6 +85,7 @@ static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
 static int radio_nr = -1;
 module_param(radio_nr, int, 0);
 
+static unsigned long in_use;
 
 #define FREQ_LO          50*16000
 #define FREQ_HI         150*16000
@@ -99,10 +100,21 @@ module_param(radio_nr, int, 0);
 #define BITS2FREQ(x)    ((x) * FREQ_STEP - FREQ_IF)
 
 
+static int maxiradio_exclusive_open(struct inode *inode, struct file *file)
+{
+        return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+}
+
+static int maxiradio_exclusive_release(struct inode *inode, struct file *file)
+{
+        clear_bit(0, &in_use);
+        return 0;
+}
+
 static const struct file_operations maxiradio_fops = {
         .owner          = THIS_MODULE,
-        .open           = video_exclusive_open,
-        .release        = video_exclusive_release,
+        .open           = maxiradio_exclusive_open,
+        .release        = maxiradio_exclusive_release,
         .ioctl          = video_ioctl2,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = v4l_compat_ioctl32,