From: Felipe Balbi <felipe.balbi@linux.intel.com>
Date: Mon, 30 May 2016 10:42:33 +0000 (+0300)
Subject: usb: dwc3: gadget: decrement trbs_left for each sg entry
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d6dc2e76a860d6be0129daae43e5f12461531d20;p=linux-beck.git

usb: dwc3: gadget: decrement trbs_left for each sg entry

If we don't, we will overwrite valid TRBs.

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 3d2978cebdff..d2884a414e20 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -924,7 +924,7 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 			chain = false;
 		}
 
-		if (!trbs_left)
+		if (!trbs_left--)
 			last = true;
 
 		if (last)