linux-kernel - Re: [PATCH v2 1/9] PCI/PME: Drop unused support for PMEs from Root Complex Event Collectors

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Message-ID: <4459736.K6pDNqTrTR@vostro.rjw.lan>
Date:   Mon, 21 Nov 2016 23:28:56 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     linux-pci@...r.kernel.org,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Lukas Wunner <lukas@...ner.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/9] PCI/PME: Drop unused support for PMEs from Root Complex Event Collectors

On Monday, November 21, 2016 03:45:19 PM Bjorn Helgaas wrote:
> Since we register pcie_pme_driver only for PCI_EXP_TYPE_ROOT_PORT, the PME
> driver never claims Root Complex Event Collectors.
> 
> Remove unused code related to Root Complex Event Collectors.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> ---
>  drivers/pci/pcie/pme.c |   17 +----------------
>  1 file changed, 1 insertion(+), 16 deletions(-)
> 
> diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
> index 884bad5..9e8aa9d 100644
> --- a/drivers/pci/pcie/pme.c
> +++ b/drivers/pci/pcie/pme.c
> @@ -319,23 +319,8 @@ static int pcie_pme_set_native(struct pci_dev *dev, void *ign)
>  static void pcie_pme_mark_devices(struct pci_dev *port)
>  {
>  	pcie_pme_set_native(port, NULL);
> -	if (port->subordinate) {
> +	if (port->subordinate)
>  		pci_walk_bus(port->subordinate, pcie_pme_set_native, NULL);
> -	} else {
> -		struct pci_bus *bus = port->bus;
> -		struct pci_dev *dev;
> -
> -		/* Check if this is a root port event collector. */
> -		if (pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC || !bus)
> -			return;
> -
> -		down_read(&pci_bus_sem);
> -		list_for_each_entry(dev, &bus->devices, bus_list)
> -			if (pci_is_pcie(dev)
> -			    && pci_pcie_type(dev) == PCI_EXP_TYPE_RC_END)
> -				pcie_pme_set_native(dev, NULL);
> -		up_read(&pci_bus_sem);
> -	}
>  }
>  
>  /**

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>