linux-kernel - Re: [PATCH 10/14] pci: pciehp clean flow in pciehp_configure

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Message-ID: <20100115111445.4a1312d1@jbarnes-piketon>
Date:	Fri, 15 Jan 2010 11:14:45 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Alex Chiang <achiang@...com>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH 10/14] pci: pciehp clean flow in pciehp_configure_device

On Tue, 22 Dec 2009 15:02:30 -0800
Yinghai Lu <yinghai@...nel.org> wrote:

> move out bus_size_bridges and assign resources out of
> pciehp_add_bridge() and at last do them all together one time
> including slot bridge, to avoid to call assign resources several
> times, when there are several bridges under the slot bridge.
> use pci_assign_nassigned_bridge_resources
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> ---
>  drivers/pci/hotplug/pciehp_pci.c |   23 +++++++++++++++++------
>  1 files changed, 17 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pci/hotplug/pciehp_pci.c
> b/drivers/pci/hotplug/pciehp_pci.c index 2173310..0a16444 100644
> --- a/drivers/pci/hotplug/pciehp_pci.c
> +++ b/drivers/pci/hotplug/pciehp_pci.c
> @@ -53,17 +53,15 @@ static int __ref pciehp_add_bridge(struct pci_dev
> *dev) busnr = pci_scan_bridge(parent, dev, busnr, pass);
>  	if (!dev->subordinate)
>  		return -1;
> -	pci_bus_size_bridges(dev->subordinate);
> -	pci_bus_assign_resources(parent);
> -	pci_enable_bridges(parent);
> -	pci_bus_add_devices(parent);
> +
>  	return 0;
>  }
>  
>  int pciehp_configure_device(struct slot *p_slot)
>  {
>  	struct pci_dev *dev;
> -	struct pci_bus *parent =
> p_slot->ctrl->pcie->port->subordinate;
> +	struct pci_dev *bridge = p_slot->ctrl->pcie->port;
> +	struct pci_bus *parent = bridge->subordinate;
>  	int num, fn;
>  	struct controller *ctrl = p_slot->ctrl;
>  
> @@ -96,12 +94,25 @@ int pciehp_configure_device(struct slot *p_slot)
>  				(dev->hdr_type ==
> PCI_HEADER_TYPE_CARDBUS)) { pciehp_add_bridge(dev);
>  		}
> +		pci_dev_put(dev);
> +	}
> +
> +	pci_assign_unassigned_bridge_resources(bridge);
> +
> +	for (fn = 0; fn < 8; fn++) {
> +		dev = pci_get_slot(parent, PCI_DEVFN(0, fn));
> +		if (!dev)
> +			continue;
> +		if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
> +			pci_dev_put(dev);
> +			continue;
> +		}
>  		pci_configure_slot(dev);
>  		pci_dev_put(dev);
>  	}
>  
> -	pci_bus_assign_resources(parent);
>  	pci_bus_add_devices(parent);
> +
>  	return 0;
>  }

This seems like a nice cleanup, can you rebase on the merged patches
from 9/14 (including the master bit change Kenji-san wanted)?

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center
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