Re: [PATCH rc] iommu/amd: Fix premature break in init_iommu_one() again

["Jörg Rödel" <joro@8bytes.org>]

On Mon, Aug 24, 2026 at 06:29:07AM +0000, Vasant Hegde wrote:
> Commit 283d245468a2 ("iommu/amd: Fix premature break in
> init_iommu_one()") unintentionally broke older platforms - such as
> the ASRockRack B550D4-4L - where the BIOS advertises incorrect IOMMU
> features.
> 
> Move the HATDis check ahead of the GASup check, and re-introduce the
> break inside the GASup check to restore correct behavior on affected
> platforms.
> 
> This is a short-term fix to resolve the regression. Longer term, we
> should rework how EFRs are tracked and prioritize the MMIO-advertised
> EFR over the one reported via IVRS. That requires more extensive
> changes and will be addressed separately.
> 
> Fixes: 283d245468a2 ("iommu/amd: Fix premature break in init_iommu_one()")
> Reported-by: Andreas Juch <andreas@juch.cc>
> Closes: https://lore.kernel.org/linux-iommu/07b2d390-f7a0-47e2-bc2c-eb0853acf52e@juch.cc/
> Tested-by: Andreas Juch <andreas@juch.cc>
> Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
> ---
>  drivers/iommu/amd/init.c | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)

Queued for -rc, thanks.