linux-kernel - Re: [PATCH v11 1/5] PCI: Conditionally initialize host bridge native

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Message-ID: <CAKF3qh1j1GAOxK8QAwAgPpn3wxtvZgp8QJQ2zjcv5B=jEVG_eg@mail.gmail.com>
Date:   Wed, 28 Oct 2020 14:09:18 +0800
From:   Ethan Zhao <xerces.zhao@...il.com>
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-pci <linux-pci@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ashok Raj <ashok.raj@...el.com>, knsathya@...nel.org
Subject: Re: [PATCH v11 1/5] PCI: Conditionally initialize host bridge
 native_* members

On Tue, Oct 27, 2020 at 10:00 PM Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@...ux.intel.com> wrote:
>
> If CONFIG_PCIEPORTBUS is not enabled in kernel then initialing
> struct pci_host_bridge PCIe specific native_* members to "1" is
> incorrect. So protect the PCIe specific member initialization
> with CONFIG_PCIEPORTBUS.
>
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
> ---
>  drivers/pci/probe.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 4289030b0fff..756fa60ca708 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -588,12 +588,14 @@ static void pci_init_host_bridge(struct pci_host_bridge *bridge)
>          * may implement its own AER handling and use _OSC to prevent the
>          * OS from interfering.
>          */
> +#ifdef CONFIG_PCIEPORTBUS
>         bridge->native_aer = 1;
>         bridge->native_pcie_hotplug = 1;
> -       bridge->native_shpc_hotplug = 1;
>         bridge->native_pme = 1;
> -       bridge->native_ltr = 1;
>         bridge->native_dpc = 1;
> +#endif
  If CONFIG_PCIEPORTBUS wasn't defined, leave them to "unknown" value ?

> +       bridge->native_ltr = 1;
> +       bridge->native_shpc_hotplug = 1;
>
>         device_initialize(&bridge->dev);
>  }
> --
> 2.17.1
>