[PATCH RESEND v6] PCI/portdev: Disable AER for Titan Ridge 4C 2018

[Aditya Garg]

> On 13 Jan 2026, at 11:03 PM, Atharva Tiwari <atharvatiwarilinuxdev at gmail.com> wrote:
> 
> Disable AER for Intel Titan Ridge 4C 2018
> (used in T2 iMacs, where the warnings appear)
> that generate continuous pcieport warnings. such as:
> 
> pcieport 0000:00:1c.4: AER: Correctable error message received from 0000:07:00.0
> pcieport 0000:07:00.0: PCIe Bus Error: severity=Correctable, type=Data Link Layer, (Receiver ID)
> pcieport 0000:07:00.0:   device [8086:15ea] error status/mask=00000080/00002000
> pcieport 0000:07:00.0:    [ 7] BadDLLP
> 
> macOS also disables AER for Thunderbolt devices and controllers in their drivers.
> 
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220651
> Signed-off-by: Atharva Tiwari <atharvatiwarilinuxdev at gmail.com>

Looking at the comment: https://bugzilla.kernel.org/show_bug.cgi?id=220651#c4, I am deducing 2 things:

1. You need AER for a driver you are writing
2. AER was working before 6.1

I think finding the cause of the regression would be better than disabling the thing itself right?

And if disabling AER has its benefits, please write a proper commit message.