[PATCH] iommu/arm-smmu-v3: fix probe device bug due to duplicated stream IDS.

Jason Gunthorpe jgg at ziepe.ca
Thu Oct 23 11:12:35 PDT 2025


On Sat, Oct 11, 2025 at 10:30:03AM +0800, Reaper Li wrote:
> From: Reaper <reaperlioc at glenfly.com>
> 
> Commit 9246b487ab3c ("PCI: Add function 0 DMA alias quirk for Glenfly Arise
> chip ") add quirk to fix hda dma request issue, but IORT logic populaties
> two identical IDs into the fwspec->ids array via DMA aliasing in
> iort_pci_iommu_init() called by pci_for_each_dma_alias().

I'd rather we not have duplicate IDs in the same fwspec, can we avoid
that at the source?

Jason



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