diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 8933f60..ba75c27 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -346,6 +346,28 @@
 	return ret;
 }
 
+static int ehci_iaa_cycle(struct ehci_ctrl *ctrl)
+{
+	u32 cmd, status;
+	int ret;
+
+	/* Enable Interrupt on Async Advance Doorbell. */
+	cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
+	cmd |= CMD_IAAD;
+	ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
+
+	ret = handshake(&ctrl->hcor->or_usbsts, STS_IAA, STS_IAA,
+			10 * 1000); /* 10ms timeout */
+	if (ret < 0)
+		printf("EHCI fail timeout STS_IAA set\n");
+
+	status = ehci_readl(&ctrl->hcor->or_usbsts);
+	if (status & STS_IAA)
+		ehci_writel(&ctrl->hcor->or_usbsts, STS_IAA);
+
+	return ret;
+}
+
 static int
 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 		   int length, struct devrequest *req)
@@ -631,6 +653,11 @@
 	flush_dcache_range((unsigned long)&ctrl->qh_list,
 		ALIGN_END_ADDR(struct QH, &ctrl->qh_list, 1));
 
+	/* Set IAAD, poll IAA */
+	ret = ehci_iaa_cycle(ctrl);
+	if (ret)
+		goto fail;
+
 	/*
 	 * Invalidate the memory area occupied by buffer
 	 * Don't try to fix the buffer alignment, if it isn't properly
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 8e07554..e9e6f2a 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -44,6 +44,7 @@
 #define STS_ASS		(1 << 15)
 #define	STS_PSS		(1 << 14)
 #define STS_HALT	(1 << 12)
+#define STS_IAA		(1 << 5)
 	uint32_t or_usbintr;
 #define INTR_UE         (1 << 0)                /* USB interrupt enable */
 #define INTR_UEE        (1 << 1)                /* USB error interrupt enable */