The TRBs left calculation didn't account for the link TRB taking up one
spot.
If the trb_dequeue < trb_enqueue, then the result includes the link
TRB slot so it must be adjusted.
Signed-off-by: John Youn <johny...@synopsys.com>
---
drivers/usb/dwc3/gadget.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 09ced5c..2d41b86 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -882,6 +882,9 @@ static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
trbs_left = dep->trb_dequeue - dep->trb_enqueue;
trbs_left %= DWC3_TRB_NUM;
+ if (dep->trb_dequeue < dep->trb_enqueue)
+ trbs_left--;
+
return trbs_left;
}
--
2.8.2
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