diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c
index 8b49bbcd894e..1889d75f8788 100644
--- a/drivers/usb/gadget/function/uvc_video.c
+++ b/drivers/usb/gadget/function/uvc_video.c
@@ -126,7 +126,7 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video,
 	sg = sg_next(sg);
 
 	for_each_sg(sg, iter, ureq->sgt.nents - 1, i) {
-		if (!len || !buf->sg)
+		if (!len || !buf->sg || !sg_dma_len(buf->sg))
 			break;
 
 		sg_left = sg_dma_len(buf->sg) - buf->offset;