linux-kernel - Re: [RESEND x2][PATCH 0/3] dwc2 fixes for edge cases on hikey

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Message-ID: <2B3535C5ECE8B5419E3ECBE3007729090269FF70AC@US01WEMBX2.internal.synopsys.com>
Date:   Sat, 30 Sep 2017 17:13:32 +0000
From:   John Youn <John.Youn@...opsys.com>
To:     John Stultz <john.stultz@...aro.org>,
        lkml <linux-kernel@...r.kernel.org>
CC:     Wei Xu <xuwei5@...ilicon.com>, Guodong Xu <guodong.xu@...aro.org>,
        "Amit Pundir" <amit.pundir@...aro.org>,
        YongQin Liu <yongqin.liu@...aro.org>,
        "John Youn" <John.Youn@...opsys.com>,
        Minas Harutyunyan <Minas.Harutyunyan@...opsys.com>,
        Douglas Anderson <dianders@...omium.org>,
        Chen Yu <chenyu56@...wei.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [RESEND x2][PATCH 0/3] dwc2 fixes for edge cases on hikey

On 09/20/2017 12:57 PM, John Stultz wrote:
> So here are a few dwc2 fixes that I've been using with HiKey.
> I'm not totally sure these are all ideal, but they avoid edge case
> issues that we have been running into with switching between
> gadget mode and host mode.
>
> I'd guess the first two are potentially -stable material, and
> the last might be worth sending to -stable too, as its a relatively
> simple fix, but to my understanding the UDC state tracking has
> always been broken so its not really a regression. But still.
>
> I'd love to get some feedback on the patches and consideration
> to be merged upstream.
>
> thanks
> -john
>
> Cc: Wei Xu <xuwei5@...ilicon.com>
> Cc: Guodong Xu <guodong.xu@...aro.org>
> Cc: Amit Pundir <amit.pundir@...aro.org>
> Cc: YongQin Liu <yongqin.liu@...aro.org>
> Cc: John Youn <johnyoun@...opsys.com>
> Cc: Minas Harutyunyan <Minas.Harutyunyan@...opsys.com>
> Cc: Douglas Anderson <dianders@...omium.org>
> Cc: Chen Yu <chenyu56@...wei.com>
> Cc: Felipe Balbi <felipe.balbi@...ux.intel.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: linux-usb@...r.kernel.org
>
> John Stultz (3):
>   usb: dwc2: Improve gadget state disconnection handling
>   usb: dwc2: Error out of dwc2_hsotg_ep_disable() if we're in host mode
>   usb: dwc2: Fix UDC state tracking
>
>  drivers/usb/dwc2/gadget.c | 7 +++++++
>  drivers/usb/dwc2/hcd.c    | 8 ++++++--
>  2 files changed, 13 insertions(+), 2 deletions(-)
>

Hi John,

I think we have something that fixes these issues.

Minas,

Could you take a look at this? I was not able to find the patches we
talked about. If possible, please post them so that John can try them
out.

Thanks,
John