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path: root/drivers/usb/musb/musb_gadget.c
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Diffstat (limited to 'drivers/usb/musb/musb_gadget.c')
-rw-r--r--drivers/usb/musb/musb_gadget.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 0a50a35e1853..6aeb363e63e7 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1524,6 +1524,12 @@ static void musb_gadget_fifo_flush(struct usb_ep *ep)
1524 csr = musb_readw(epio, MUSB_TXCSR); 1524 csr = musb_readw(epio, MUSB_TXCSR);
1525 if (csr & MUSB_TXCSR_FIFONOTEMPTY) { 1525 if (csr & MUSB_TXCSR_FIFONOTEMPTY) {
1526 csr |= MUSB_TXCSR_FLUSHFIFO | MUSB_TXCSR_P_WZC_BITS; 1526 csr |= MUSB_TXCSR_FLUSHFIFO | MUSB_TXCSR_P_WZC_BITS;
1527 /*
1528 * Setting both TXPKTRDY and FLUSHFIFO makes controller
1529 * to interrupt current FIFO loading, but not flushing
1530 * the already loaded ones.
1531 */
1532 csr &= ~MUSB_TXCSR_TXPKTRDY;
1527 musb_writew(epio, MUSB_TXCSR, csr); 1533 musb_writew(epio, MUSB_TXCSR, csr);
1528 /* REVISIT may be inappropriate w/o FIFONOTEMPTY ... */ 1534 /* REVISIT may be inappropriate w/o FIFONOTEMPTY ... */
1529 musb_writew(epio, MUSB_TXCSR, csr); 1535 musb_writew(epio, MUSB_TXCSR, csr);