linux-kernel - Re: boot failure with 4.13.0-rc6 due to ATA errors

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Date:   Tue, 29 Aug 2017 12:51:02 -0300
From:   Henrique de Moraes Holschuh <hmh@....eng.br>
To:     Tejun Heo <tj@...nel.org>
Cc:     David Ahern <dsahern@...il.com>, Christoph Hellwig <hch@....de>,
        linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Robert Elliott <elliott@....com>
Subject: Re: boot failure with 4.13.0-rc6 due to ATA errors

On Tue, 29 Aug 2017, Tejun Heo wrote:
> On Tue, Aug 29, 2017 at 09:08:05AM -0600, David Ahern wrote:
> > On 8/29/17 6:42 AM, Christoph Hellwig wrote:
> > > ---
> > > From e661047ec3a25587648b07c02a687a7dac778f3b Mon Sep 17 00:00:00 2001
> > > From: Christoph Hellwig <hch@....de>
> > > Date: Tue, 29 Aug 2017 14:35:50 +0200
> > > Subject: libata: check for trusted computing in IDENTIFY DEVICE data
> > > 
> > > ATA-8 and later mirrors the TRUSTED COMPUTING SUPPORTED bit in word 48 of
> > > the IDENTIFY DEVICE data.  Check this before issuing a READ LOG PAGE
> > > command to avoid issues with buggy devices.  The only downside is that
> > > we can't support Security Send / Receive for a device with an older
> > > revision due to the conflicting use of this field in earlier
> > > specifications.
> 
> Christoph, I'm gonna revert the horkage patch and apply this one.  If
> you can think of a better way to do this, please let me know.

The one thing that comes to mind would be an additional patch to allow
people with ATA-7 to bypass the identify device data, and rely just on
the read log page check, based on a kernel command line parameter.

If we get enough sucessful reports to make it worth it, an whitelist
could be added...

-- 
  Henrique Holschuh