linux-kernel - Re: [PATCH 1/2] PCI: pciehp: Add support for OS-First Hotplug and AER/DPC

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Message-ID: <20230516101403.GA3398@wunner.de>
Date:   Tue, 16 May 2023 12:14:03 +0200
From:   Lukas Wunner <lukas@...ner.de>
To:     Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>, oohall@...il.com,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Yazen Ghannam <yazen.ghannam@....com>,
        Fontenot Nathan <Nathan.Fontenot@....com>
Subject: Re: [PATCH 1/2] PCI: pciehp: Add support for OS-First Hotplug and
 AER/DPC

On Mon, May 15, 2023 at 01:56:25PM -0700, Smita Koralahalli wrote:
> Could I please know, why do you think masking surprise down during
> initialization would be a better approach than reading surprise down error
> status on a DPC event? Because in both approaches we should be however
> clearing status registers right?

Masking seemed much simpler, more elegant, less code.

I wasn't aware that masking the error merely suppresses the message to
the Root Complex plus the resulting interrupt, but still logs the error.
That's kind of a bummer, so I think your approach is fine and I've just
sent you some review feedback on your patch.

Thanks,

Lukas