linux-kernel - Re: [PATCH v9 5/6] PCI: generic: Make pci-host-generic driver numa aware

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Message-ID: <569D23AF.9050503@gmail.com>
Date:	Mon, 18 Jan 2016 09:41:03 -0800
From:	David Daney <ddaney.cavm@...il.com>
To:	Ganapatrao Kulkarni <gkulkarni@...iumnetworks.com>
CC:	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
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Subject: Re: [PATCH v9 5/6] PCI: generic: Make pci-host-generic driver numa
 aware

On 01/18/2016 08:36 AM, Ganapatrao Kulkarni wrote:
> update numa_node of device associated with pci bus.
> moved down devm_kzalloc to allocate from node memory.
>
> Signed-off-by: Ganapatrao Kulkarni <gkulkarni@...iumnetworks.com>
> ---
>   drivers/pci/host/pci-host-generic.c | 9 ++++++---
>   1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c
> index 5434c90..0e1ce06 100644
> --- a/drivers/pci/host/pci-host-generic.c
> +++ b/drivers/pci/host/pci-host-generic.c
> @@ -215,11 +215,9 @@ static int gen_pci_probe(struct platform_device *pdev)
>   	const struct of_device_id *of_id;
>   	struct device *dev = &pdev->dev;
>   	struct device_node *np = dev->of_node;
> -	struct gen_pci *pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
> +	struct gen_pci *pci;
>   	struct pci_bus *bus, *child;
>
> -	if (!pci)
> -		return -ENOMEM;
>
>   	type = of_get_property(np, "device_type", NULL);
>   	if (!type || strcmp(type, "pci")) {
> @@ -230,6 +228,11 @@ static int gen_pci_probe(struct platform_device *pdev)
>   	of_pci_check_probe_only();
>
>   	of_id = of_match_node(gen_pci_of_match, np);
> +	set_dev_node(dev, of_node_to_nid(np));

This shouldn't be done in individual platform_drivers, but instead in 
the device probing code.

There is code that does this in drivers/of/platform.c and 
drivers/of/device.c  Is that not being called for the pci-host-gweneric 
devices?  If not, we should figure out why, and perhaps attempt to fix 
it rather than doing it here.


> +	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
> +	if (!pci)
> +		return -ENOMEM;
> +
>   	pci->cfg.ops = (struct gen_pci_cfg_bus_ops *)of_id->data;
>   	pci->host.dev.parent = dev;
>   	INIT_LIST_HEAD(&pci->host.windows);
>