diff --git a/[refs] b/[refs]
index 1b6d5af78d47..10598cc920a0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fa84c57516f6da93ebc2601348043e9bcb7b4b4d
+refs/heads/master: d3c568c302ed0e3b2d51f0335f304ca4d85de54b
diff --git a/trunk/include/linux/usb/renesas_usbhs.h b/trunk/include/linux/usb/renesas_usbhs.h
index 547e59cc00ea..c5d36c65c33b 100644
--- a/trunk/include/linux/usb/renesas_usbhs.h
+++ b/trunk/include/linux/usb/renesas_usbhs.h
@@ -132,6 +132,14 @@ struct renesas_usbhs_driver_param {
 	 * option:
 	 *
 	 * dma id for dmaengine
+	 * The data transfer direction on D0FIFO/D1FIFO should be
+	 * fixed for keeping consistency.
+	 * So, the platform id settings will be..
+	 *	.d0_tx_id = xx_TX,
+	 *	.d1_rx_id = xx_RX,
+	 * or
+	 *	.d1_tx_id = xx_TX,
+	 *	.d0_rx_id = xx_RX,
 	 */
 	int d0_tx_id;
 	int d0_rx_id;