From: Felipe Balbi <felipe.balbi@linux.intel.com>
Date: Wed, 10 Aug 2016 15:07:46 +0000 (+0300)
Subject: usb: dwc3: gadget: stop processing on HWO set
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a0ad85ae866f8a01f29a18ffa1e9b1aa8ca888bd;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

usb: dwc3: gadget: stop processing on HWO set

stop consuming TRBs when we reach one with HWO bit
already set. This will prevent us from prematurely
retiring a TRB.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 7a4d4d2534d4..1f5597ef945d 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1979,16 +1979,7 @@ static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep,
 		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
 
 	if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
-		/*
-		 * We continue despite the error. There is not much we
-		 * can do. If we don't clean it up we loop forever. If
-		 * we skip the TRB then it gets overwritten after a
-		 * while since we use them in a ring buffer. A BUG()
-		 * would help. Lets hope that if this occurs, someone
-		 * fixes the root cause instead of looking away :)
-		 */
-		dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n",
-				dep->name, trb);
+		return 1;
 
 	count = trb->size & DWC3_TRB_SIZE_MASK;