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authorThinh Nguyen <Thinh.Nguyen@synopsys.com>2018-01-12 18:18:27 -0800
committerFelipe Balbi <felipe.balbi@linux.intel.com>2018-02-12 10:48:39 +0200
commitf035d139ffece7b6a7b8bfb17bd0ba715ee57a04 (patch)
treef419767ec292fa1b3dfa2c0fd48f14de237aa46f /drivers/usb
parent6180026341e852a250e1f97ebdcf71684a3c81b9 (diff)
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: 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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/dwc3/ep0.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 9c2e4a17918e..18be31d5743a 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -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;
}