This is a note to let you know that I've just added the patch titled usb: dwc2: Fix UDC state tracking to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-dwc2-fix-udc-state-tracking.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Wed Dec 6 18:04:41 CET 2017 From: John Stultz <john.stultz@xxxxxxxxxx> Date: Mon, 23 Oct 2017 14:32:50 -0700 Subject: usb: dwc2: Fix UDC state tracking From: John Stultz <john.stultz@xxxxxxxxxx> [ Upstream commit ce2b21a4e5ce042c0a42c9db8fa9e0f849427d5e ] 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. This patch does depend on the previous patch ("usb: dwc2: Improve gadget state disconnection handling") in this patch set in order to properly work. 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 Acked-by: Minas Harutyunyan <hminas@xxxxxxxxxxxx> Tested-by: Minas Harutyunyan <hminas@xxxxxxxxxxxx> Reported-by: Amit Pundir <amit.pundir@xxxxxxxxxx> Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx> Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/dwc2/gadget.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3202,6 +3202,8 @@ void dwc2_hsotg_disconnect(struct dwc2_h call_gadget(hsotg, disconnect); hsotg->lx_state = DWC2_L3; + + usb_gadget_set_state(&hsotg->gadget, USB_STATE_NOTATTACHED); } /** Patches currently in stable-queue which might be from john.stultz@xxxxxxxxxx are queue-4.14/usb-dwc2-error-out-of-dwc2_hsotg_ep_disable-if-we-re-in-host-mode.patch queue-4.14/usb-dwc2-fix-udc-state-tracking.patch