We need to decrement in both cases (enq > deq and
enq < deq)
Signed-off-by: Felipe Balbi <[email protected]>
---
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 594e82595634..e4ef9ed1a143 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;
}
--
2.9.1
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