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authorMinas Harutyunyan <minas.harutyunyan@synopsys.com>2019-01-31 18:28:07 +0400
committerFelipe Balbi <felipe.balbi@linux.intel.com>2019-02-07 13:14:51 +0200
commit97311c8f8b6e26d5ba6508f0df430ad80fc59327 (patch)
treedab14469605fa1f65d4d94a6801f7ab29932dc88 /drivers
parent836bcab50624d728abeab3766f356d54c48ea1b1 (diff)
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 <hminas@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/dwc2/gadget.c1
1 files changed, 1 insertions, 0 deletions
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;