[PATCH v6 13/30] PCI: Introduce new scan function pci_scan_host_bridge()

[Bjorn Helgaas]

On Mon, Mar 09, 2015 at 10:34:10AM +0800, Yijing Wang wrote:
> Introduce new scan function pci_scan_host_bridge() to
> support host bridge drivers that need to provide platform
> own pci_host_bridge_ops.
> 
> Signed-off-by: Yijing Wang <wangyijing at huawei.com>
> Signed-off-by: Bjorn Helgaas <bhelgaas at google.com>
> ---
>  drivers/pci/probe.c |   22 ++++++++++++++++++++++
>  include/linux/pci.h |    4 ++++
>  2 files changed, 26 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 59d9be3..99f17e3 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -2064,6 +2064,28 @@ static struct pci_bus *__pci_scan_root_bus(
>  	return b;
>  }
>  
> +struct pci_host_bridge *pci_scan_host_bridge(struct device *parent,
> +		u32 db, struct pci_ops *ops, void *sysdata,
> +		struct list_head *resources,
> +		struct pci_host_bridge_ops *phb_ops)

Drop the "phb_" prefix.

> +{
> +	struct pci_host_bridge *host;
> +	struct pci_bus *bus;
> +
> +	host = pci_create_host_bridge(parent, db, resources,
> +			sysdata, phb_ops);
> +	if (!host)
> +		return NULL;
> +
> +	bus = __pci_scan_root_bus(host, ops);
> +	if (!bus)
> +		pci_free_host_bridge(host);
> +
> +	return host;
> +}
> +EXPORT_SYMBOL(pci_scan_host_bridge);
> +
> +
>  struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db,
>  		struct pci_ops *ops, void *sysdata, struct list_head *resources)
>  {
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index e9922b1..28eafb5 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -790,6 +790,10 @@ void pci_bus_release_busn_res(struct pci_bus *b);
>  struct pci_bus *pci_scan_root_bus(struct device *parent, u32 dombus,
>  					     struct pci_ops *ops, void *sysdata,
>  					     struct list_head *resources);
> +struct pci_host_bridge *pci_scan_host_bridge(struct device *parent,
> +		u32 dombus, struct pci_ops *ops, void *sysdata,
> +		struct list_head *resources,
> +		struct pci_host_bridge_ops *phb_ops);
>  struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
>  				int busnr);
>  void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
> -- 
> 1.7.1
> 
> --
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