On Mon, Jun 21, 2021 at 06:27:22PM +0800, Dongdong Liu wrote:

PCIe spec 5.0r1.0 section 2.2.6.2 implementation note, In configurations
where a Requester with 10-Bit Tag Requester capability needs to target
multiple Completers, one needs to ensure that the Requester sends 10-Bit
Tag Requests only to Completers that have 10-Bit Tag Completer capability.
So we enable 10-Bit Tag Requester for root port only when the devices
under the root port support 10-Bit Tag Completer.

Signed-off-by: Dongdong Liu <redacted>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>