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authorThinh Nguyen <Thinh.Nguyen@synopsys.com>2018-01-12 18:18:27 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-28 10:19:43 +0100
commita1e8aa2176d2cfbfa444df0461a906b455e9e66b (patch)
parent49e18b2ba887724ae43b1169ad0b8e747fd5aad9 (diff)
usb: dwc3: ep0: Reset TRB counter for ep0 IN
commit f035d139ffece7b6a7b8bfb17bd0ba715ee57a04 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: c2da2ff00606 ("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>
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 75e6cb044eb2..89fe53c846ef 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -884,7 +884,12 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
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;