Commit f035d139 authored by Thinh Nguyen's avatar Thinh Nguyen Committed by Felipe Balbi
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usb: dwc3: ep0: Reset TRB counter for ep0 IN 



DWC3 tracks TRB counter for each ep0 direction separately. In control
read transfer completion handler, the driver needs to reset the TRB
enqueue counter for ep0 IN direction. Currently the driver only resets
the TRB counter for control OUT endpoint. Check for the data direction
and properly reset the TRB counter from correct control endpoint.

Cc: stable@vger.kernel.org
Fixes: c2da2ff0 ("usb: dwc3: ep0: don't use ep0in for transfers")
Signed-off-by: default avatarThinh Nguyen <thinhn@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 61800263

drivers/usb/dwc3/ep0.c

+6 −1
Original line number Diff line number Diff line
@@ -854,7 +854,12 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc, 
		trb++;

		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;

		trace_dwc3_complete_trb(ep0, trb);

		ep0->trb_enqueue = 0;



		if (r->direction)

			dwc->eps[1]->trb_enqueue = 0;

		else

			dwc->eps[0]->trb_enqueue = 0;



		dwc->ep0_bounced = false;

	}