From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Date: Tue, 12 Jun 2018 08:37:29 +0000 (+0400)
Subject: usb: dwc2: gadget: Fix issue in dwc2_gadget_start_isoc()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7b2dc4515f030658f9cae3f1d7e294ab8238e39f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

usb: dwc2: gadget: Fix issue in dwc2_gadget_start_isoc()

[ Upstream commit 1ffba9058737af2ddeebc813faa8ea9b16bc892a ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 6ef001a83fe2..7c6aa505fb68 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -932,6 +932,7 @@ static void dwc2_gadget_start_isoc_ddma(struct dwc2_hsotg_ep *hs_ep)
 	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;
 	}