RE: [PATCH] usb: hub: move resume delay at the head of all USB access functions

[Pan, Harry]

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@xxxxxxxxxxxxx]
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@xxxxxxxxxxxxxxx; Linux-Kernel@Vger. 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/