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usb: dwc3: ep0: Reset TRB counter for ep0 IN

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commit f035d139ff upstream.

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: c2da2ff006 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thinh Nguyen 2018-01-12 18:18:27 -08:00 committed by Greg Kroah-Hartman
parent 49e18b2ba8
commit a1e8aa2176
1 changed files with 6 additions and 1 deletions
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7
drivers/usb/dwc3/ep0.c
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@ -884,7 +884,12 @@ 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;
}