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

Tejun Heo
2017-08-29T15:55:09Z

Hello, Henrique.

On Tue, Aug 29, 2017 at 12:51:02PM -0300, Henrique de Moraes Holschuh wrote:
> > > > 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...

If the ones we miss are the ones based on old revisions, does it
matter? If we have to, we can just whitelist those devices and I
don't expect there to be many.

Thanks.

--
tejun