Re: [PATCH 01/04] PCI: rcar: Register each instance independently

Geert Uytterhoeven
2014-02-05T08:02:56Z

On Wed, Feb 5, 2014 at 7:52 AM, Magnus Damm <magnus.damm@gmail.com> wrote:
> +static int rcar_pci_probe(struct platform_device *pdev)
> {
> struct resource *cfg_res, *mem_res;
> struct rcar_pci_priv *priv;
> void __iomem *reg;
> + struct hw_pci hw;
>
> cfg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> reg = devm_ioremap_resource(&pdev->dev, cfg_res);
> @@ -308,31 +271,26 @@ static int __init rcar_pci_probe(struct
> priv->reg = reg;
> priv->dev = &pdev->dev;
>
> - return rcar_pci_add_controller(priv);
> + memset(&hw, 0, sizeof(hw));
> + hw.nr_controllers = 1;
> + hw.private_data = (void **)&priv;

This raised a red flag: taking the address of a variable on the stack.
I know it's correct, as hw.private_data is an array of pointers copied
by pci_common_init_dev() below.
But perhaps it's a good idea to turn priv into an array with one element,
to make this clearer, and avoid the ugly cast?

> + hw.map_irq = rcar_pci_map_irq;
> + hw.ops = &rcar_pci_ops;
> + hw.setup = rcar_pci_setup;
> + pci_common_init_dev(&pdev->dev, &hw);
> + return 0;

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds