netdev - Re: [PATCH V5 6/6] PCI: Enable 10-Bit tag support for PCIe RP devices

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Message-ID: <YNGA5ie1nA4i5l4R@infradead.org>
Date:   Tue, 22 Jun 2021 07:19:18 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Dongdong Liu <liudongdong3@...wei.com>
Cc:     helgaas@...nel.org, hch@...radead.org, kw@...ux.com,
        linux-pci@...r.kernel.org, rajur@...lsio.com,
        hverkuil-cisco@...all.nl, linux-media@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH V5 6/6] PCI: Enable 10-Bit tag support for PCIe RP devices

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 <liudongdong3@...wei.com>

Looks good,

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