[PATCH v2 5/7] powerpc/pci: Add pci_find_controller_for_domain()

[Sam Bobroff]

On Fri, Feb 15, 2019 at 11:48:15AM +1100, Oliver O'Halloran wrote:
> Add a helper to find the pci_controller structure based on the domain
> number / phb id.
> 
> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>

Reviewed-by: Sam Bobroff <sbobroff at linux.ibm.com>

> ---
> v2: Renamed pci_find_hose_for_domain() to
>     pci_find_controller_for_domain()
> ---
>  arch/powerpc/include/asm/pci-bridge.h |  2 ++
>  arch/powerpc/kernel/pci-common.c      | 11 +++++++++++
>  2 files changed, 13 insertions(+)
> 
> diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
> index aee4fcc24990..feea9534a015 100644
> --- a/arch/powerpc/include/asm/pci-bridge.h
> +++ b/arch/powerpc/include/asm/pci-bridge.h
> @@ -274,6 +274,8 @@ extern int pcibios_map_io_space(struct pci_bus *bus);
>  extern struct pci_controller *pci_find_hose_for_OF_device(
>  			struct device_node* node);
>  
> +extern struct pci_controller *pci_find_controller_for_domain(int domain_nr);
> +
>  /* Fill up host controller resources from the OF node */
>  extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
>  			struct device_node *dev, int primary);
> diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
> index 88e4f69a09e5..21eeeabb3e0e 100644
> --- a/arch/powerpc/kernel/pci-common.c
> +++ b/arch/powerpc/kernel/pci-common.c
> @@ -357,6 +357,17 @@ struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
>  	return NULL;
>  }
>  
> +struct pci_controller *pci_find_controller_for_domain(int domain_nr)
> +{
> +	struct pci_controller *hose;
> +
> +	list_for_each_entry(hose, &hose_list, list_node)
> +		if (hose->global_number == domain_nr)
> +			return hose;
> +
> +	return NULL;
> +}
> +
>  /*
>   * Reads the interrupt pin to determine if interrupt is use by card.
>   * If the interrupt is used, then gets the interrupt line from the
> -- 
> 2.20.1
> 
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