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Date:   Mon, 5 Jun 2023 21:48:23 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Jason Andryuk <jandryuk@gmail.com>
Cc:     stable@vger.kernel.org, Juergen Gross <jgross@suse.com>,
        Borislav Petkov <bp@alien8.de>,
        Christian Kujau <lists@nerdbynature.de>
Subject: Re: Request: x86/mtrr: Revert 90b926e68f50 ("x86/pat: Fix
 pat_x_mtrr_type() for MTRR disabled case")
Message-ID: <2023060513-self-ditch-57f5@gregkh>
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On Mon, Jun 05, 2023 at 09:56:24AM -0400, Jason Andryuk wrote:
> x86/mtrr: Revert 90b926e68f50 ("x86/pat: Fix pat_x_mtrr_type() for
> MTRR disabled case")
> 
> commit f9f57da2c2d119dbf109e3f6e1ceab7659294046 upstream
> 
> The requested patch fixes ioremap for certain devices when running as
> a Xen Dom0.  Without the patch, one example is TPM device probing
> failing with:
> tpm_tis IFX:00: ioremap failed for resource
> 
> The requested patch did not include a Fixes tag, but it was intended
> as a fix to upstream 90b926e68f500844dff16b5bcea178dc55cf580a, which
> was subsequently backported to 6.1 as
> c1c59538337ab6d45700cb4a1c9725e67f59bc6e.  The requested patch being a
> fix can be seen in the thread here:
> https://lore.kernel.org/lkml/167636735608.4906.4788207020350311572.tip-bot2@tip-bot2/
> 
> I think it's only applicable to 6.1

Now queued up, thanks.

greg k-h