[media] v4l: vsp1: Fix error return code in vsp1_video_init()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/platform/vsp1/vsp1_video.c

@@ -1026,8 +1026,10 @@ int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
 
 	/* ... and the buffers queue... */
 	video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
-	if (IS_ERR(video->alloc_ctx))
+	if (IS_ERR(video->alloc_ctx)) {
+		ret = PTR_ERR(video->alloc_ctx);
 		goto error;
+	}
 
 	video->queue.type = video->type;
 	video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;