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V4L/DVB (8732): zr364xx: handle video exclusive open internaly 

Count the users and do not use video_exclusive_open() anymore.

Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antoine Jacquet 2008-08-18 17:14:30 -03:00 committed by Mauro Carvalho Chehab
parent 69025c934b
commit 33d27a4516
1 changed files with 14 additions and 10 deletions
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24
drivers/media/video/zr364xx.c
View File

@ -116,6 +116,7 @@ struct zr364xx_camera {
int height;
int method;
struct mutex lock;
int users;
};
@ -643,11 +644,10 @@ static int zr364xx_open(struct inode *inode, struct file *file)
mutex_lock(&cam->lock);
cam->skip = 2;
err = video_exclusive_open(inode, file);
if (err < 0)
if (cam->users) {
err = -EBUSY;
goto out;
}
if (!cam->framebuf) {
cam->framebuf = vmalloc_32(MAX_FRAME_SIZE * FRAMES);
@ -669,6 +669,8 @@ static int zr364xx_open(struct inode *inode, struct file *file)
}
}
cam->skip = 2;
cam->users++;
file->private_data = vdev;
/* Added some delay here, since opening/closing the camera quickly,
@ -700,6 +702,10 @@ static int zr364xx_release(struct inode *inode, struct file *file)
udev = cam->udev;
mutex_lock(&cam->lock);
cam->users--;
file->private_data = NULL;
for (i = 0; i < 2; i++) {
err =
send_control_msg(udev, 1, init[cam->method][i].value,
@ -707,21 +713,19 @@ static int zr364xx_release(struct inode *inode, struct file *file)
init[cam->method][i].size);
if (err < 0) {
info("error during release sequence");
mutex_unlock(&cam->lock);
return err;
goto out;
}
}
file->private_data = NULL;
video_exclusive_release(inode, file);
/* Added some delay here, since opening/closing the camera quickly,
* like Ekiga does during its startup, can crash the webcam
*/
mdelay(100);
err = 0;
out:
mutex_unlock(&cam->lock);
return 0;
return err;
}