On Thu, 21 Jan 2021 17:24:19 -0800, Moritz Fischer wrote:

Address issue observed on real world system with suboptimal IORT table
where DMA masks of PCI devices would get set to 0 as result.

iort_dma_setup() would query the root complex'/named component IORT
entry for a DMA mask, and use that over the one the device has been
configured with earlier.

[...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] ACPI/IORT: Do not blindly trust DMA masks from firmware
      https://git.kernel.org/arm64/c/a1df829ead58

-- 
Catalin