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

[Oliver O'Halloran <oohall@gmail.com>]

Add a helper to find the pci_controller structure based on the domain
number / phb id.

Signed-off-by: Oliver O'Halloran <oohall@gmail.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