linux-kernel - Re: [PATCH V4 1/1] Intel Sky Lake-E host root ports check.

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Date:   Wed, 30 Mar 2022 12:37:20 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Shlomo Pongratz <shlomopongratz@...il.com>
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        andrew.maier@...eticom.com, logang@...tatee.com,
        bhelgaas@...gle.com, helgaas@...nel.org,
        Shlomo Pongratz <shlomop@...ops.com>
Subject: Re: [PATCH V4 1/1] Intel Sky Lake-E host root ports check.

On Wed, Mar 30, 2022 at 05:08:23PM +0300, Shlomo Pongratz wrote:
> @@ -350,7 +353,10 @@ static struct pci_dev *pci_host_bridge_dev(struct pci_host_bridge *host)
>  
>  	if (!root)
>  		return NULL;
> -	if (root->devfn != PCI_DEVFN(0, 0))
> +
> +	/* Is it a host bridge or a root port? */

This is a better comment:

/* host bridges must have a 0 devfn, but some of the entries in the
  whilelist are root ports that can have any devfn */

> +	if (root->devfn != PCI_DEVFN(0, 0) &&
> +		pci_pcie_type(root) != PCI_EXP_TYPE_ROOT_PORT)
>  		return NULL;

Indentation is wrong

Jason