[RFC PATCH 14/16] arm/PCI: Introduce pci_get_domain_nr()

[Yijing Wang]

Signed-off-by: Yijing Wang <wangyijing at huawei.com>
---
 arch/arm/include/asm/mach/pci.h |    9 +++++++++
 arch/arm/kernel/bios32.c        |    8 ++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
index f19f627..370b3bd 100644
--- a/arch/arm/include/asm/mach/pci.h
+++ b/arch/arm/include/asm/mach/pci.h
@@ -90,6 +90,15 @@ extern void pci_map_io_early(unsigned long pfn);
 static inline void pci_map_io_early(unsigned long pfn) {}
 #endif
 
+#ifdef CONFIG_PCI_DOMAINS_GENERIC
+int pci_get_domain_nr(struct device *parent)
+#else
+static inline int pci_get_domain_nr(struct device *parent)
+{
+	return 0;
+}
+#endif
+
 /*
  * PCI controllers
  */
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index d8c2b4e..3fe56f1 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -513,7 +513,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
 #ifdef CONFIG_PCI_DOMAINS_GENERIC
 static bool dt_domain_found;
 
-void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+int pci_get_domain_nr(struct device *parent)
 {
 	int domain = of_get_pci_domain_nr(parent->of_node);
 
@@ -526,8 +526,12 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
 	} else {
 		domain = pci_get_new_domain_nr();
 	}
+	return domain;
+}
 
-	bus->domain_nr = domain;
+void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+{
+	bus->domain_nr = pci_get_domain_nr(parent);
 }
 #endif
 
-- 
1.7.1