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Date:   Wed, 20 Jan 2021 13:06:48 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     David Woodhouse <dwmw2@infradead.org>
Cc:     Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
        stable@vger.kernel.org, iommu <iommu@lists.linux-foundation.org>,
        "Mendoza-jonas, Samuel" <samjonas@amazon.com>,
        "Sironi, Filippo" <sironi@amazon.de>
Subject: Re: [PATCH] iommu/vt-d: gracefully handle DMAR units with no
 supported address widths
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On Wed, Jan 20, 2021 at 09:42:43AM +0000, David Woodhouse wrote:
> On Thu, 2020-09-24 at 15:08 +0100, David Woodhouse wrote:
> > From: David Woodhouse <dwmw@amazon.co.uk>
> > 
> > Instead of bailing out completely, such a unit can still be used for
> > interrupt remapping.
> > 
> > Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
> 
> Could we have this for stable too please, along with the trivial
> subsequent fixup. They are:
> 
> c40aaaac1018 ("iommu/vt-d: Gracefully handle DMAR units with no supported address widths")
> 9def3b1a07c4 ("iommu/vt-d: Don't dereference iommu_device if IOMMU_API is not built")
> 
> They apply fairly straightforwardly when backported; let me know if you
> want us to send patches.

What stable kernel(s) do you want this in?  The above patches are
already in 5.10.

thanks,

greg k-h