linux-kernel - Re: [PATCH] usb: xhci: skip re-check pending port event if hibernated

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Message-ID: <c448da77-f2f3-8b79-fc4b-b9dcff727c6e@linux.intel.com>
Date:   Fri, 10 Dec 2021 15:33:16 +0200
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Mathias Nyman <mathias.nyman@...el.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Eddie Hung <eddie.hung@...iatek.com>,
        Yun-Chien Yu <yun-chien.yu@...iatek.com>
Subject: Re: [PATCH] usb: xhci: skip re-check pending port event if hibernated

On 9.12.2021 9.22, Chunfeng Yun wrote:
> When xHCI controller hibernated, the root hub lost power, if controller
> support Port Power Control (PPC), PP is not set at xhci_resume() and
> set by hub_reset_resume() later, so no need check pending port event.
> If PPC is not supported, device is disconneced, seems do not send out
> U3 LFPS wake signal, no need re-check again and drop 120ms delay to
> save resume time.
> 
> Reported-by: Yun-Chien Yu <yun-chien.yu@...iatek.com>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> ---

Thanks, adding

-Mathias