usb: dwc3: gadget: reset resource index to zero

If we collected two requests together (i.e. only the last of them has
LST=1) then we only have to stop transfer once: The clean-up code will
cleanup everything until first TRB with the LST bit set.
After XferComplete this index should be no longer valid since there is
no transfer pending.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 56f0e46c00adf4f82826f9f31e685fa9ee6aa6cd..a324957c38f0c173b8f47e56893b582504b10fd2 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1366,8 +1366,10 @@ static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc,
                status = -ECONNRESET;
 
        clean_busy =  dwc3_cleanup_done_reqs(dwc, dep, event, status);
-       if (clean_busy)
+       if (clean_busy) {
                dep->flags &= ~DWC3_EP_BUSY;
+               dep->res_trans_idx = 0;
+       }
 }
 
 static void dwc3_gadget_start_isoc(struct dwc3 *dwc,
@@ -1537,6 +1539,7 @@ static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum)
                memset(&params, 0, sizeof(params));
                ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, &params);
                WARN_ON_ONCE(ret);
+               dep->res_trans_idx = 0;
        }
 }