[RESEND x2][PATCH 3/3] usb: dwc2: Fix UDC state tracking

From: John Stultz
Date: Wed Sep 20 2017 - 15:58:04 EST

It has been noticed that the dwc2 udc state reporting doesn't
seem to work (at least on HiKey boards). Where after the initial
setup, the sysfs /sys/class/udc/f72c0000.usb/state file would
report "configured" no matter the state of the OTG port.

This patch adds a call so that we report to the UDC layer when
the gadget device is disconnected.

Cc: Wei Xu <xuwei5@xxxxxxxxxxxxx>
Cc: Guodong Xu <guodong.xu@xxxxxxxxxx>
Cc: Amit Pundir <amit.pundir@xxxxxxxxxx>
Cc: YongQin Liu <yongqin.liu@xxxxxxxxxx>
Cc: John Youn <johnyoun@xxxxxxxxxxxx>
Cc: Minas Harutyunyan <Minas.Harutyunyan@xxxxxxxxxxxx>
Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
Cc: Chen Yu <chenyu56@xxxxxxxxxx>
Cc: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
Reported-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
drivers/usb/dwc2/gadget.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 7fd0e38..603c216 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3202,6 +3202,8 @@ void dwc2_hsotg_disconnect(struct dwc2_hsotg *hsotg)

call_gadget(hsotg, disconnect);
hsotg->lx_state = DWC2_L3;
+ usb_gadget_set_state(&hsotg->gadget, USB_STATE_NOTATTACHED);