From 6f8245b4e37c2072d3daea24e19dbc0162ffd22c Mon Sep 17 00:00:00 2001 From: Felipe Balbi <felipe.balbi@linux.intel.com> Date: Wed, 24 Aug 2016 14:40:13 +0300 Subject: [PATCH] usb: dwc3: gadget: always decrement by 1 We need to decrement in both cases (enq > deq and enq < deq) Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> --- drivers/usb/dwc3/gadget.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 122e64df2f4dc..7a8d3d822b549 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -884,12 +884,9 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep) return DWC3_TRB_NUM - 1; } - trbs_left = dep->trb_dequeue - dep->trb_enqueue; + trbs_left = dep->trb_dequeue - dep->trb_enqueue - 1; trbs_left &= (DWC3_TRB_NUM - 1); - if (dep->trb_dequeue < dep->trb_enqueue) - trbs_left--; - return trbs_left; } -- 2.30.2