Re: [PATCH v4 06/18] PCI/P2PDMA: Gate the host bridge whitelist warning on verbose

From: Jason Gunthorpe

Date: Mon Aug 24 2026 - 19:23:45 EST


On Fri, 21 Aug 2026 22:38:37 +0300, Leon Romanovsky <leon@xxxxxxxxxx> wrote:
> calc_map_type_and_dist() prints every other diagnostic under its verbose
> argument, but reaches the "Host bridge not in P2PDMA whitelist" warning
> through host_bridge_whitelist(), which it hands acs_redirects instead.
> A caller that asked for a silent answer still gets the warning whenever
> any port on the path has an ACS redirect bit set, the CPU is not
> whitelisted by cpu_supports_p2pdma(), and the host bridge is not in
> pci_p2pdma_whitelist[].
>
> [...]

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

--
Jason