Date:   Fri, 3 Dec 2021 16:29:42 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     Mathias Nyman <mathias.nyman@linux.intel.com>,
        Lu Baolu <baolu.lu@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>, x86@kernel.org,
        linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: earlyprintk=xdbc seems broken
Message-ID: <Yao35lElOkwtBYEb@kroah.com>
References: <YajkzwmWQua3Kh6A@hirez.programming.kicks-ass.net>
 <105f35d2-3c53-b550-bfb4-aa340d31128e@linux.intel.com>
 <88f466ff-a065-1e9a-4226-0abe2e71b686@linux.intel.com>
 <972a0e28-ad63-9766-88da-02743f80181b@intel.com>
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In-Reply-To: <972a0e28-ad63-9766-88da-02743f80181b@intel.com>
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On Fri, Dec 03, 2021 at 07:22:57AM -0800, Dave Hansen wrote:
> 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@linuxfoundation.org> (supporter:USB SUBSYSTEM)
> > Mike Rapoport <rppt@kernel.org> (commit_signer:1/1=100%,authored:1/1=100%,added_lines:5/5=100%,removed_lines:5/5=100%)
> > Andrew Morton <akpm@linux-foundation.org> (commit_signer:1/1=100%)
> > linux-usb@vger.kernel.org (open list:USB SUBSYSTEM)
> > linux-kernel@vger.kernel.org (open list)

Intel is the only one that has this hardware :(