X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fmedia%2Fusb%2Fuvc%2Fuvc_v4l2.c;fp=kernel%2Fdrivers%2Fmedia%2Fusb%2Fuvc%2Fuvc_v4l2.c;h=2764f43607c146a454a4bcbd89e6d5edc472acfc;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=c4b1ac6750d8d6fb8516ce2f8dcdd06ff629b311;hpb=f93b97fd65072de626c074dbe099a1fff05ce060;p=kvmfornfv.git

diff --git a/kernel/drivers/media/usb/uvc/uvc_v4l2.c b/kernel/drivers/media/usb/uvc/uvc_v4l2.c
index c4b1ac675..2764f4360 100644
--- a/kernel/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/kernel/drivers/media/usb/uvc/uvc_v4l2.c
@@ -483,9 +483,6 @@ static int uvc_v4l2_open(struct file *file)
 	uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
 	stream = video_drvdata(file);
 
-	if (stream->dev->state & UVC_DEV_DISCONNECTED)
-		return -ENODEV;
-
 	ret = usb_autopm_get_interface(stream->dev->intf);
 	if (ret < 0)
 		return ret;
@@ -723,6 +720,18 @@ static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 	return uvc_queue_buffer(&stream->queue, buf);
 }
 
+static int uvc_ioctl_expbuf(struct file *file, void *fh,
+			    struct v4l2_exportbuffer *exp)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	if (!uvc_has_privileges(handle))
+		return -EBUSY;
+
+	return uvc_export_buffer(&stream->queue, exp);
+}
+
 static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 {
 	struct uvc_fh *handle = fh;
@@ -1478,6 +1487,7 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops = {
 	.vidioc_reqbufs = uvc_ioctl_reqbufs,
 	.vidioc_querybuf = uvc_ioctl_querybuf,
 	.vidioc_qbuf = uvc_ioctl_qbuf,
+	.vidioc_expbuf = uvc_ioctl_expbuf,
 	.vidioc_dqbuf = uvc_ioctl_dqbuf,
 	.vidioc_create_bufs = uvc_ioctl_create_bufs,
 	.vidioc_streamon = uvc_ioctl_streamon,