From 97311c8f8b6e26d5ba6508f0df430ad80fc59327 Mon Sep 17 00:00:00 2001 From: Minas Harutyunyan Date: Thu, 31 Jan 2019 18:28:07 +0400 Subject: usb: dwc2: Fix EP TxFIFO number setting In case when some EP IN is frequently reused, i.e. enabled/disabled by function driver. It is required to clear TxFIFO number field in DIEPCTL register before setting new number. Otherwise there is probability to have same TxFIFO number for different EP's because of OR operator. Signed-off-by: Minas Harutyunyan Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/gadget.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb/dwc2') diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 55ef3cc2701b..e15d8a462085 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -4005,6 +4005,7 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep, ret = -ENOMEM; goto error1; } + epctrl &= ~(DXEPCTL_TXFNUM_LIMIT << DXEPCTL_TXFNUM_SHIFT); hsotg->fifo_map |= 1 << fifo_index; epctrl |= DXEPCTL_TXFNUM(fifo_index); hs_ep->fifo_index = fifo_index; -- cgit v1.2.3