Re: [PATCH] of: treat PCI config space as IORESOURCE_MEM type

Rob Herring
2014-05-29T20:44:52Z

On Thu, May 29, 2014 at 11:03 AM, Kumar Gala <galak@codeaurora.org> wrote:
> If we have a PCI config space specified in something like a ranges
> property we should treat it as memory type resource.

Config space should not be in ranges[1]. We have some cases that are,
but we don't want new ones.

>
> Signed-off-by: Kumar Gala <galak@codeaurora.org>
> ---
> drivers/of/address.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/of/address.c b/drivers/of/address.c
> index cb4242a..4e7ee59 100644
> --- a/drivers/of/address.c
> +++ b/drivers/of/address.c
> @@ -122,6 +122,9 @@ static unsigned int of_bus_pci_get_flags(const __be32 *addr)
> u32 w = be32_to_cpup(addr);
>
> switch((w >> 24) & 0x03) {
> + case 0x00: /* cfg space */
> + flags |= IORESOURCE_MEM;
> + break;

How would you then distinguish actual memory ranges?

Rob

[1] http://www.spinics.net/lists/linux-pci/msg30585.html