linux-kernel - Re: [PATCH] usb: hub: move resume delay at the head of all USB access functions

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Date:   Thu, 26 Dec 2019 17:07:40 +0800
From:   AceLan Kao <acelan.kao@...onical.com>
To:     "Pan, Harry" <harry.pan@...el.com>
Cc:     Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        David Heinzelmann <heinzelmann.david@...il.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Mathieu Malaterre <malat@...ian.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb: hub: move resume delay at the head of all USB access functions

Sorry, I just corrected the file permission.

Pan, Harry <harry.pan@...el.com> 於 2019年12月26日 週四 下午12:14寫道：
>
> Hi AceLan,
>
> Would you mind to read this thread and evaluate whether it is helpful or not by kernel downgrade?
> https://bugzilla.kernel.org/show_bug.cgi?id=202541
>
> BTW, would you mind to the shared pcap file permission as well?
>
> -Harry
> ________________________________________
> 從: AceLan Kao [acelan.kao@...onical.com]
> 寄件日期: 2019年12月25日 上午 11:15
> 至: Alan Stern
> 副本: Greg Kroah-Hartman; Kai-Heng Feng; Thinh Nguyen; Pan, Harry; David Heinzelmann; Andrey Konovalov; Nicolas Saenz Julienne; Mathieu Malaterre; linux-usb@...r.kernel.org; Linux-Kernel@...r. Kernel. Org
> 主旨: Re: [PATCH] usb: hub: move resume delay at the head of all USB access functions
>
> Here[1] are the dmesg and the usbmon log from wireshark, and
> /sys/kernel/debug/usb/usbmon/0u.
>
> I verified this issue on Dell XPS 13 + Dell Salomon WD19 docking
> station(plug-in 3 USB disk on it)
> After s2idle 7 times, 2 usb disks lost. But from wireshark log, the
> packets look normal, no error.
>
> So, I re-do the test again and log the usbmon/0u output, but it's greek to me.
> Hope you can help to find some clues in the logs.
> Thanks.
>
> 1. https://people.canonical.com/~acelan/bugs/usb_issue/