linux-kernel - Re: [PATCH 1/6] x86: Use PCI_HEADER_TYPE

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Date:   Fri, 1 Dec 2023 14:44:47 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 1/6] x86: Use PCI_HEADER_TYPE_* instead of literals

On Fri, Nov 24, 2023 at 11:09:13AM +0200, Ilpo Järvinen wrote:
> Replace 0x7f and 0x80 literals with PCI_HEADER_TYPE_* defines.
> 
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

Applied entire series on the PCI "enumeration" branch for v6.8,
thanks!

If anybody wants to take pieces separately, let me know and I'll drop
from PCI.

> ---
>  arch/x86/kernel/aperture_64.c  | 3 +--
>  arch/x86/kernel/early-quirks.c | 4 ++--
>  2 files changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
> index 4feaa670d578..89c0c8a3fc7e 100644
> --- a/arch/x86/kernel/aperture_64.c
> +++ b/arch/x86/kernel/aperture_64.c
> @@ -259,10 +259,9 @@ static u32 __init search_agp_bridge(u32 *order, int *valid_agp)
>  							order);
>  				}
>  
> -				/* No multi-function device? */
>  				type = read_pci_config_byte(bus, slot, func,
>  							       PCI_HEADER_TYPE);
> -				if (!(type & 0x80))
> +				if (!(type & PCI_HEADER_TYPE_MFD))
>  					break;
>  			}
>  		}
> diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
> index a6c1867fc7aa..59f4aefc6bc1 100644
> --- a/arch/x86/kernel/early-quirks.c
> +++ b/arch/x86/kernel/early-quirks.c
> @@ -779,13 +779,13 @@ static int __init check_dev_quirk(int num, int slot, int func)
>  	type = read_pci_config_byte(num, slot, func,
>  				    PCI_HEADER_TYPE);
>  
> -	if ((type & 0x7f) == PCI_HEADER_TYPE_BRIDGE) {
> +	if ((type & PCI_HEADER_TYPE_MASK) == PCI_HEADER_TYPE_BRIDGE) {
>  		sec = read_pci_config_byte(num, slot, func, PCI_SECONDARY_BUS);
>  		if (sec > num)
>  			early_pci_scan_bus(sec);
>  	}
>  
> -	if (!(type & 0x80))
> +	if (!(type & PCI_HEADER_TYPE_MFD))
>  		return -1;
>  
>  	return 0;
> -- 
> 2.30.2
>