Date:   Fri, 03 Dec 2021 12:36:43 +0100
Message-ID: <s5hzgphsywk.wl-tiwai@suse.de>
From:   Takashi Iwai <tiwai@suse.de>
To:     Mathias Nyman <mathias.nyman@linux.intel.com>
Cc:     Robert Munteanu <rombert@apache.org>,
        Mathias Nyman <mathias.nyman@intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        tiwai@suse.com, regressions@lists.linux.dev,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Regression: plugging in USB scanner breaks all USB functionality
In-Reply-To: <a649395b-0b91-a0d2-c510-ea8ec4aef917@linux.intel.com>
References: <35f7428b39f996c793f5b4a6a314772681c73d7a.camel@apache.org>
        <a649395b-0b91-a0d2-c510-ea8ec4aef917@linux.intel.com>
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On Fri, 03 Dec 2021 11:57:38 +0100,
Mathias Nyman wrote:
> 
> On 2.12.2021 16.55, Robert Munteanu wrote:
> > Hi,
> > 
> > After updating from kernel 5.14.11 to 5.14.14 I am seeing the following
> > problem:
> > 
> > When plugging in an USB scanner ( Brother DSMobile DS-740D ) to my
> > Lenovo P52 laptop I lose connection to all USB devices. Not only are
> > the devices no longer available on the host, but no power is drawn by
> > them. Only a reboot fixes the problem.
> > 
> > The scanner is the only device that triggers the problem, even when it
> > is the only device plugged in. I have a host of other devices,
> > connected either directly or via a USB hub in my monitor:
> > 
> 
> There is one xhci patch in that range that has caused other issues:
> ff0e50d3564f xhci: Fix command ring pointer corruption while aborting a command
> 
> That patch has a fix that is not yet applied, fix can be found here:
> https://lore.kernel.org/linux-usb/20211126122340.1193239-2-mathias.nyman@linux.intel.com/
> or
> https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/commit/?h=for-usb-linus&id=385b5b09c3546c87cfb730b76abe5f8d73c579a2
> 
> Does reverting the original patch, or applying the fix help?

Thanks!

For convenience, I'm building a test 15.5.x kernel for openSUSE TW in
OBS home:tiwai:bsc1192569 repo.  Robert, if you have time, please test
it later.


Takashi