linux-kernel - Re: Regarding usb dwc3 core shutdown callback

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Message-ID: <87bl63yqq8.fsf@kernel.org>
Date:   Thu, 12 Aug 2021 12:07:08 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Sandeep Maheswaram <sanm@...eaurora.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Pratham Pratap <prathampratap@...eaurora.org>,
        Jack Pham <jackp@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Doug Anderson <dianders@...omium.org>
Subject: Re: Regarding usb dwc3 core shutdown callback


Hi,

(why isn't this email plain/text? Content Type was set to multipart
alternative, please configure your email client correctly :-)

While at that, also make sure to break lines at 80-columns)

Sandeep Maheswaram <sanm@...eaurora.org> writes:
> Hi,
>
> Earlier I have posted the patch for usb dwc3 core shutdown callback
>
> https://lore.kernel.org/linux-arm-msm/1618380209-20114-1-git-send-email-sanm@codeaurora.org/
>
> and it was reverted due to issues.

Right, as should be expected when we find regressions

> https://lore.kernel.org/linux-usb/20210603151742.298243-1-alexandru.elisei@arm.com/
>
> As we already have shutdown callback in xhci plat driver where we halt
> the controller, so there will be no transactions with usb devices.
>
> https://lore.kernel.org/linux-usb/20200306092328.41253-1-ran.wang_1@nxp.com/
>
> So I think dwc3 core shutdown may not be required at least when we are
> using host mode. Let me know your opinion about this.

If that's the case, then sure. Please validate the condition, though,
and kindly report back on your findings

-- 
balbi