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

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

Change-Id: I8076fa857b9ae016617d58836de3d9dcf5be9e4c
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
(cherry picked from commit d6dc2e76a860d6be0129daae43e5f12461531d20)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 178cf6581cfeeac5b49310f930d87c12fe89ebbe..5a4d7d85563943590849685bed69795d46c8ed9a 100644 (file)
--- 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)