Commit f035d139 authored Jan 12, 2018 by Thinh Nguyen Committed by Felipe Balbi Feb 12, 2018

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: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe 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;
		}

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