linux-kernel - Re: [REGRESSION][BISECTED] usb: hub: total system freeze after running adb

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Message-ID: <7gcuiktbbd7vharjdl7gbpjqgk6dd0kibb@sonic.net>
Date: Tue, 02 Dec 2025 10:44:17 -0800
From: Forest <forestix@...a.casa>
To: Mathias Nyman <mathias.nyman@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Stefan Eichenberger <stefan.eichenberger@...adex.com>,
        Pawel Laszczak <pawell@...ence.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, regressions@...ts.linux.dev
Subject: Re: [REGRESSION][BISECTED] usb: hub: total system freeze after running adb

On Thu, 20 Nov 2025 14:04:45 -0800, Forest wrote:

>On Tue, 18 Nov 2025 11:21:18 +0200, Mathias Nyman wrote:
>
>>If the bisected patch is the issue then disabling runtime suspend could help.
>>For all usb* roothubs:
>>
>>echo on > /sys/bus/usb/devices/usb*/power/control
>>
>>Does it affect anything?
>
>Yes. After setting all of those to 'on', I have been unable to
>reproduce the freeze. Tested for nearly 12 hours so far, so I think
>it does avoid the problem. (I'll do some more testing and report
>back if that changes.)

I've now tested this workaround for about 36 hours with no freeze. 
Looks to me like the bisected commit is indeed the source of the bug.