Merge branch 'for-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...

[cascardo/linux.git] / drivers / usb / dwc3 / gadget.c

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 7a8d3d8..122e64d 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -884,9 +884,12 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
                return DWC3_TRB_NUM - 1;
        }
 
-       trbs_left = dep->trb_dequeue - dep->trb_enqueue - 1;
+       trbs_left = dep->trb_dequeue - dep->trb_enqueue;
        trbs_left &= (DWC3_TRB_NUM - 1);
 
+       if (dep->trb_dequeue < dep->trb_enqueue)
+               trbs_left--;
+
        return trbs_left;
 }