This is a note to let you know that I've just added the patch titled
usb: dwc2: Fix UDC state tracking
to the 4.9-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-4.9 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 17:39:55 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
@@ -2467,6 +2467,8 @@ 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-4.9/usb-dwc2-error-out-of-dwc2_hsotg_ep_disable-if-we-re-in-host-mode.patch
queue-4.9/usb-dwc2-fix-udc-state-tracking.patch