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Date:   Sat, 17 Oct 2020 16:02:00 -0400
From:   Alan Stern <stern@rowland.harvard.edu>
To:     Pany <pany@fedoraproject.org>
Cc:     linux-usb@vger.kernel.org
Subject: Re: Bug caused by 53965c79c2db (USB: Fix device driver race)
Message-ID: <20201017200200.GB842001@rowland.harvard.edu>
References: <CAE3RAxt0WhBEz8zkHrVO5RiyEOasayy1QUAjsv-pB0fAbY1GSw@mail.gmail.com>
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On Sat, Oct 17, 2020 at 04:07:11PM +0000, Pany wrote:
> Hi,
> 
> I installed fedora 32 into an SD card, with which I booted my Macbook.
> It had worked well before, until I upgraded the kernel from 5.8.5 to
> 5.8.6 [1].
> 
> With kernel-5.8.6-200.fc32.x86_64.rpm [2] installed, the boot process
> would be stuck at "A start job is running for
> /dev/mapper/fedora_localhost_--live-home (<time> / no limit)" (See the
> photo of screen [3]).
> 
> By appending "systemd.debug-shell=1" to the kernel cmdline, I saved
> the journal [4].
> 
> This issue has been bisected to commit
> 53965c79c2dbdc898ffc7fdbab37e920594f5e14 ("USB: Fix device driver
> race")
> 
> If I revert this commit, the kernel 5.8.6 would boot successfully.

This should have been fixed in 5.8.14 or 5.8.15 (5.8.14 was released on 
the same day that the fix was installed; I'm not sure which came first).
At any rate it certainly should work with the most recent 5.8.y kernel.

Alan Stern