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

[Henrique de Moraes Holschuh]

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@xxxxxx>
> > > 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