From 1ffba9058737af2ddeebc813faa8ea9b16bc892a Mon Sep 17 00:00:00 2001
From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Date: Tue, 12 Jun 2018 12:37:29 +0400
Subject: [PATCH] usb: dwc2: gadget: Fix issue in dwc2_gadget_start_isoc()
Git-commit: 1ffba9058737af2ddeebc813faa8ea9b16bc892a
Patch-mainline: v4.18-rc3
References: bsc#1051510

In case of requests queue is empty reset EP target_frame to
initial value.

This allow restarting ISOC traffic in case when function
driver queued requests with interruptions.

Tested-by: Zeng Tao <prime.zeng@hisilicon.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/usb/dwc2/gadget.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -937,6 +937,7 @@ static void dwc2_gadget_start_isoc_ddma(
 	u32 ctrl;
 
 	if (list_empty(&hs_ep->queue)) {
+		hs_ep->target_frame = TARGET_FRAME_INITIAL;
 		dev_dbg(hsotg->dev, "%s: No requests in queue\n", __func__);
 		return;
 	}