return -ENOMEM;
}
- if (atomic_inc_return(&stream->dev->users) == 1) {
- ret = uvc_status_start(stream->dev);
+ mutex_lock(&stream->dev->lock);
+ if (stream->dev->users == 0) {
+ ret = uvc_status_start(stream->dev, GFP_KERNEL);
if (ret < 0) {
- atomic_dec(&stream->dev->users);
+ mutex_unlock(&stream->dev->lock);
usb_autopm_put_interface(stream->dev->intf);
kfree(handle);
return ret;
}
}
+ stream->dev->users++;
+ mutex_unlock(&stream->dev->lock);
+
v4l2_fh_init(&handle->vfh, stream->vdev);
v4l2_fh_add(&handle->vfh);
handle->chain = stream->chain;
kfree(handle);
file->private_data = NULL;
- if (atomic_dec_return(&stream->dev->users) == 0)
+ mutex_lock(&stream->dev->lock);
+ if (--stream->dev->users == 0)
uvc_status_stop(stream->dev);
+ mutex_unlock(&stream->dev->lock);
usb_autopm_put_interface(stream->dev->intf);
return 0;
return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl);
}
+long uvc_v4l2_ioctl_kernel(struct file *file, unsigned int cmd, void *arg)
+{
+ return uvc_v4l2_do_ioctl(file, cmd, arg);
+}
+EXPORT_SYMBOL(uvc_v4l2_ioctl_kernel);
+
#ifdef CONFIG_COMPAT
struct uvc_xu_control_mapping32 {
__u32 id;