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usb: dwc2: Fix EP TxFIFO number setting

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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 <hminas@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Minas Harutyunyan 2019-01-31 18:28:07 +04:00 committed by Felipe Balbi
parent 836bcab506
commit 97311c8f8b
1 changed files with 1 additions and 0 deletions
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drivers/usb/dwc2/gadget.c
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@ -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;