Re: [PATCH RFC] tpm_crb: Fix AMD Zen on-chip fTPM detection

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

On Fri, Jun 16, 2017 at 10:35:11PM +0200, Manuel Lauss wrote:

> > What do you mean 'mapping that fails already' ? The report you gave
> > above shows the failure is on the other region:
> >
> >  tpm_crb MSFT0101:00: can't request region for resource [mem 0xdd84f000-0xdd84ffff]
> 
> the address seems to change every boot (it's one of the two MSFT0101 devices)
> but it's always the first call to devm_ioremap_resource() in tpm_crb.c
>  line 454 that fails:
> 
>         priv->iobase = devm_ioremap_resource(dev, &io_res);

I have no idea why that would fail, based on your proc file it should
not, you need to figure out what is going on..

Jason

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