diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index e502e4807812..b4cac44ce26c 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -435,6 +435,8 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
 		mReq->ptr->page[i] = cpu_to_le32(page);
 	}
 
+	wmb();
+
 	if (!list_empty(&mEp->qh.queue)) {
 		struct ci13xxx_req *mReqPrev;
 		int n = hw_ep_bit(mEp->num, mEp->dir);
diff --git a/drivers/usb/chipidea/udc.h b/drivers/usb/chipidea/udc.h
index 4ff2384d7ca8..d12e8b59b110 100644
--- a/drivers/usb/chipidea/udc.h
+++ b/drivers/usb/chipidea/udc.h
@@ -40,7 +40,7 @@ struct ci13xxx_td {
 #define TD_CURR_OFFSET        (0x0FFFUL <<  0)
 #define TD_FRAME_NUM          (0x07FFUL <<  0)
 #define TD_RESERVED_MASK      (0x0FFFUL <<  0)
-} __attribute__ ((packed));
+} __attribute__ ((packed, aligned(4)));
 
 /* DMA layout of queue heads */
 struct ci13xxx_qh {
@@ -57,7 +57,7 @@ struct ci13xxx_qh {
 	/* 9 */
 	u32 RESERVED;
 	struct usb_ctrlrequest   setup;
-} __attribute__ ((packed));
+} __attribute__ ((packed, aligned(4)));
 
 /**
  * struct ci13xxx_req - usb request representation