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Date:   Thu, 11 Apr 2019 14:38:37 +0200
From:   Joerg Roedel <>
To:     Nikolai Kostrigin <>
Subject: Re: [PATCH RESEND 1/1] PCI: Add ATS-disable quirk for AMD Radeon R7

On Mon, Apr 08, 2019 at 01:37:25PM +0300, Nikolai Kostrigin wrote:
> ATS is broken on this hardware (at least for Stoney Ridge
> based laptop) and causes IOMMU stalls and
> system failure. Disable ATS on these devices to make them
> usable again with IOMMU enabled
> Thanks to Joerg Roedel <> for help.
> Signed-off-by: Nikolai Kostrigin <>

Acked-by: Joerg Roedel <>

I helped Nikolai with tracking this issue down to ATS handling and
suggested adding the quirk.

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