linux-kernel - Re: [PATCH v3] usb: host: xhci-mtk: avoid runtime suspend when removing hcd

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Message-ID: <b2f3aa9f-a592-0e8c-f897-f5d885fb9740@cogentembedded.com>
Date:   Wed, 3 Jun 2020 20:33:24 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Macpaul Lin <macpaul.lin@...iatek.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        stable@...r.kernel.org
Cc:     Mediatek WSD Upstream <wsd_upstream@...iatek.com>,
        Macpaul Lin <macpaul.lin@...il.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-usb@...r.kernel.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3] usb: host: xhci-mtk: avoid runtime suspend when
 removing hcd

Hello.

On 03.06.2020 16:09, Macpaul Lin wrote:

> When runtime suspend was enabled, runtime suspend might happened

    Happen.

> when xhci is removing hcd. This might cause kernel panic when hcd
> has been freed but runtime pm suspend related handle need to
> reference it.
> 
> Signed-off-by: Macpaul Lin <macpaul.lin@...iatek.com>
> Reviewed-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
[...]

MBR, Sergei