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authorHans Verkuil <hverkuil@xs4all.nl>2008-08-23 10:31:47 +0200
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-12 13:36:53 +0200
commit7d43cd53c851e3cf04d73108d4e7e25a1104c6f5 (patch)
tree4fcf2e3148065f1727b630deefef9612610bf789 /drivers/media/video/arv.c
parentV4L/DVB (8777): tea575x-tuner: replace video_exclusive_open/release (diff)
downloadlinux-7d43cd53c851e3cf04d73108d4e7e25a1104c6f5.tar.xz
linux-7d43cd53c851e3cf04d73108d4e7e25a1104c6f5.zip
V4L/DVB (8780): v4l: replace the last uses of video_exclusive_open/release
Handle the video_exclusive_open/release functionality inside the driver. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/arv.c')
-rw-r--r--drivers/media/video/arv.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c
index 9e436ad3d34b..0d4f9b683459 100644
--- a/drivers/media/video/arv.c
+++ b/drivers/media/video/arv.c
@@ -116,6 +116,7 @@ struct ar_device {
int width, height;
int frame_bytes, line_bytes;
wait_queue_head_t wait;
+ unsigned long in_use;
struct mutex lock;
};
@@ -742,10 +743,23 @@ void ar_release(struct video_device *vfd)
* Video4Linux Module functions
*
****************************************************************************/
+static struct ar_device ardev;
+
+static int ar_exclusive_open(struct inode *inode, struct file *file)
+{
+ return test_and_set_bit(0, &ardev.in_use) ? -EBUSY : 0;
+}
+
+static int ar_exclusive_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &ardev.in_use);
+ return 0;
+}
+
static const struct file_operations ar_fops = {
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = ar_exclusive_open,
+ .release = ar_exclusive_release,
.read = ar_read,
.ioctl = ar_ioctl,
#ifdef CONFIG_COMPAT
@@ -762,7 +776,6 @@ static struct video_device ar_template = {
};
#define ALIGN4(x) ((((int)(x)) & 0x3) == 0)
-static struct ar_device ardev;
static int __init ar_init(void)
{