int contrast, brightness, whitebal;
int top, left;
unsigned int bidirectional;
+ unsigned long in_use;
struct mutex lock;
};
return len;
}
+static int qcam_exclusive_open(struct inode *inode, struct file *file)
+{
+ struct video_device *dev = video_devdata(file);
+ struct qcam_device *qcam = (struct qcam_device *)dev;
+
+ return test_and_set_bit(0, &qcam->in_use) ? -EBUSY : 0;
+}
+
+static int qcam_exclusive_release(struct inode *inode, struct file *file)
+{
+ struct video_device *dev = video_devdata(file);
+ struct qcam_device *qcam = (struct qcam_device *)dev;
+
+ clear_bit(0, &qcam->in_use);
+ return 0;
+}
+
/* video device template */
static const struct file_operations qcam_fops = {
.owner = THIS_MODULE,
- .open = video_exclusive_open,
- .release = video_exclusive_release,
+ .open = qcam_exclusive_open,
+ .release = qcam_exclusive_release,
.ioctl = qcam_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = v4l_compat_ioctl32,
{
.name = "Colour QuickCam",
.fops = &qcam_fops,
+ .release = video_device_release_empty,
};
/* Initialize the QuickCam driver control structure. */
}
printk(KERN_INFO "video%d: Colour QuickCam found on %s\n",
- qcam->vdev.minor, qcam->pport->name);
+ qcam->vdev.num, qcam->pport->name);
qcams[num_cams++] = qcam;