Re: [PATCH] PCI: Disable NoSnoop and Relaxed ordering for Intel wireless BE200

On Tue, Jul 28, 2026 at 06:21:23PM +0000, Grumbach, Emmanuel wrote:
> On Tue, 2026-07-28 at 13:03 -0500, Bjorn Helgaas wrote:
> ...

> > AFAICS we still don't know why Tegra264 would set NoSnoop and/or
> > RlxdOrd in the MMIO read.
> 
> Me neither but... I can't comment on that. And de-facto, once it does
> that, the BE200 replies with the NoSnoop and RlxOrd clear in the TLP
> which is then considered as a malformed TLP.
> 
> > Unless iwlwifi asked for NoSnoop and/or RlxdOrd to be set, I think
> > it's a potential problem for drivers if Tegra264 sets them.
> 
> I ... don't think we would do that. The driver would certainly not do
> that... Regarding the hardware itself, I can't comment, but I can check
> internally.

Forgot to ask, can you collect the output of "sudo lspci -vv", at
least for the RP and the BE200?

And maybe the dmesg log when booted with "log_buf_len=16M
pci=earlydump" as well, so we can see if attributes were enabled by a
bootloader?