linux-kernel - Re: [PATCH v10 6/8] PCI: Setup ACPI fwnode early and at the same time with OF

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Message-ID: <20210712170934.34666a1f.alex.williamson@redhat.com>
Date:   Mon, 12 Jul 2021 17:09:34 -0600
From:   Alex Williamson <alex.williamson@...hat.com>
To:     Amey Narkhede <ameynarkhede03@...il.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Raphael Norwitz <raphael.norwitz@...anix.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        kw@...ux.com, Shanker Donthineni <sdonthineni@...dia.com>,
        Sinan Kaya <okaya@...nel.org>, Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>
Subject: Re: [PATCH v10 6/8] PCI: Setup ACPI fwnode early and at the same
 time with OF

On Fri,  9 Jul 2021 18:08:11 +0530
Amey Narkhede <ameynarkhede03@...il.com> wrote:

> From: Shanker Donthineni <sdonthineni@...dia.com>
> 
> The pci_dev objects are created through two mechanisms 1) during PCI
> bus scan and 2) from I/O Virtualization. The fwnode in pci_dev object
> is being set at different places depends on the type of firmware used,
> device creation mechanism, and acpi_pci_bridge_d3() WAR.
> 
> The software features which have a dependency on ACPI fwnode properties
> and need to be handled before device_add() will not work. One use case,
> the software has to check the existence of _RST method to support ACPI
> based reset method.
> 
> This patch does the two changes in order to provide fwnode consistently.
>  - Set ACPI and OF fwnodes from pci_setup_device().
>  - Remove pci_set_acpi_fwnode() in acpi_pci_bridge_d3().
> 
> After this patch, ACPI/OF firmware properties are visible at the same
> time during the early stage of pci_dev setup. And also call sites should
> be able to use firmware agnostic functions device_property_xxx() for the
> early PCI quirks in the future.
> 
> Signed-off-by: Shanker Donthineni <sdonthineni@...dia.com>
> ---
>  drivers/pci/pci-acpi.c | 1 -
>  drivers/pci/probe.c    | 7 ++++---
>  2 files changed, 4 insertions(+), 4 deletions(-)

Looks ok to me.

Reviewed-by: Alex Williamson <alex.williamson@...hat.com>