linux-kernel - Re: earlyprintk=xdbc seems broken

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Message-ID: <972a0e28-ad63-9766-88da-02743f80181b@intel.com>
Date:   Fri, 3 Dec 2021 07:22:57 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, linux-usb@...r.kernel.org
Subject: Re: earlyprintk=xdbc seems broken

On 12/3/21 6:31 AM, Mathias Nyman wrote:
>>> Can you please see if you can repro and fix this?
>>>
>>> This all was with current 5.16-rc3 on a tigerlake nuc.
>>>
>>> Also, perhaps you can update the guide on what sort of setup/cables
>>> etc.. you need when either the host or the client is a usb3.1 usb-c only
>>> device.
>>>
>> + Mathias, maybe he still has a USB 3.0 debugging cable.
>>
> Should have at the office, I'll pick it up next week and try it out.

Is someone at Intel responsible for this thing? get_maintainer.pl
doesn't think so:

> $ perl scripts/get_maintainer.pl ./drivers/usb/early/xhci-dbc.c
> Greg Kroah-Hartman <gregkh@...uxfoundation.org> (supporter:USB SUBSYSTEM)
> Mike Rapoport <rppt@...nel.org> (commit_signer:1/1=100%,authored:1/1=100%,added_lines:5/5=100%,removed_lines:5/5=100%)
> Andrew Morton <akpm@...ux-foundation.org> (commit_signer:1/1=100%)
> linux-usb@...r.kernel.org (open list:USB SUBSYSTEM)
> linux-kernel@...r.kernel.org (open list)