diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c
index 7223bb18b048..d35f93451ee9 100644
--- a/drivers/scsi/libiscsi_tcp.c
+++ b/drivers/scsi/libiscsi_tcp.c
@@ -480,6 +480,9 @@ static int iscsi_tcp_data_in(struct iscsi_conn *conn, struct iscsi_task *task)
 	int datasn = be32_to_cpu(rhdr->datasn);
 	unsigned total_in_length = task->sc->sdb.length;
 
+	if (task->sc->sc_data_direction != DMA_FROM_DEVICE)
+		return ISCSI_ERR_PROTO;
+
 	/*
 	 * lib iscsi will update this in the completion handling if there
 	 * is status.