diff --git a/drivers/usb/musb/musb_hcd.c b/drivers/usb/musb/musb_hcd.c
index 5481600..adb8c38 100644
--- a/drivers/usb/musb/musb_hcd.c
+++ b/drivers/usb/musb/musb_hcd.c
@@ -604,7 +604,8 @@
 					(len-txlen) : dev->epmaxpacketin[ep];
 
 			/* Set the ReqPkt bit */
-			writew(MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
+			csr = readw(&musbr->rxcsr);
+			writew(csr | MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
 
 			/* Wait until the RxPktRdy bit is set */
 			if (!wait_until_rxep_ready(dev, MUSB_BULK_EP)) {
@@ -775,7 +776,8 @@
 					(len-txlen) : dev->epmaxpacketin[ep];
 
 			/* Set the ReqPkt bit */
-			writew(MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
+			csr = readw(&musbr->rxcsr);
+			writew(csr | MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
 
 			/* Wait until the RxPktRdy bit is set */
 			if (!wait_until_rxep_ready(dev, MUSB_INTR_EP)) {