linux-kernel - Re: [PATCH V6 02/10] PCI: Replace magic constant for PCI Sig Vendor ID

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Date:   Fri, 4 Feb 2022 15:49:02 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     ira.weiny@...el.com
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ben Widawsky <ben.widawsky@...el.com>,
        linux-kernel@...r.kernel.org, linux-cxl@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH V6 02/10] PCI: Replace magic constant for PCI Sig Vendor
 ID

On Mon, Jan 31, 2022 at 11:19:44PM -0800, ira.weiny@...el.com wrote:
> From: Ira Weiny <ira.weiny@...el.com>
> 
> Based on Bjorn's suggestion[1], now that the PCI Sig Vendor ID is
> defined the define should be used in pci_bus_crs_vendor_id() rather than
> the hard coded magic value.
> 
> Replace the magic value in pci_bus_crs_vendor_id() with
> PCI_VENDOR_ID_PCI_SIG.
 
This sentence is plenty; no attribution or link needed.  I appreciate
the acknowledgement, but replacing a magic value isn't a better idea
simply because *I* suggested it ;)

> [1] https://lore.kernel.org/linux-cxl/20211117215044.GA1777828@bhelgaas/
> 
> Suggested-by: Bjorn Helgaas <bhelgaas@...gle.com>
> Signed-off-by: Ira Weiny <ira.weiny@...el.com>

Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>

> ---
>  drivers/pci/probe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 087d3658f75c..d92dbb136fc9 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -2318,7 +2318,7 @@ EXPORT_SYMBOL(pci_alloc_dev);
>  
>  static bool pci_bus_crs_vendor_id(u32 l)
>  {
> -	return (l & 0xffff) == 0x0001;
> +	return (l & 0xffff) == PCI_VENDOR_ID_PCI_SIG;
>  }
>  
>  static bool pci_bus_wait_crs(struct pci_bus *bus, int devfn, u32 *l,
> -- 
> 2.31.1
>