Re: [PATCH v2] PCI: qcom: Block accesses to downstream devices on link down

[Manivannan Sadhasivam]

On Wed, 19 Aug 2026 23:36:54 -0700, Qiang Yu wrote:
> After a PCIe link goes down, software may still access the BAR (MMIO)
> space or configuration space of devices behind that link before recovery
> has run. As the link is down, these accesses never complete, resulting in
> a storm of Completion Timeout AERs.
> 
> Use the controller's ECAM blocker to drop these accesses to the PCIe
> address space as soon as the link-down interrupt fires, so that Completion
> Timeout AERs are reduced. The blocked range covers the entire address
> space (base 0x0, all-ones limit), since the Root Port's own DBI/iATU
> register space remains accessible regardless.
> 
> [...]

Applied, thanks!

[1/1] PCI: qcom: Block accesses to downstream devices on link down
      commit: 86624b718f94517b26f96c1d7beb7632e5562afd

Best regards,
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