On Thu, Dec 18, 2014 at 08:11:42PM +0100, Lucas Stach wrote:
> This adds a simple way to get the root port a given device
> is connected to.
> 
> Signed-off-by: Lucas Stach <l.stach-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
> ---
> v2: new patch in v2
> ---
>  drivers/pci/search.c | 20 ++++++++++++++++++++
>  include/linux/pci.h  |  1 +
>  2 files changed, 21 insertions(+)
> 
> diff --git a/drivers/pci/search.c b/drivers/pci/search.c
> index a81f413083e4..c3ae1c52c7cf 100644
> --- a/drivers/pci/search.c
> +++ b/drivers/pci/search.c
> @@ -385,3 +385,23 @@ int pci_dev_present(const struct pci_device_id *ids)
>  	return 0;
>  }
>  EXPORT_SYMBOL(pci_dev_present);
> +
> +/**
> + * pci_get_rootport - Returns the root port the given device is connected to.
> + * @dev: PCI device for which the root port should be found.
> + */
> +struct pci_dev *pci_get_rootport(struct pci_dev *dev)

I think pci_find_root_port() would be slightly more consistent with the
existing API.

Thierry