[PATCH v10 08/29] PCI: Introduce pci_host_assign_domain_nr() to assign domain

[Yijing Wang]

Introduce pci_host_assign_domain_nr() to assign domain
number for pci_host_bridge. In the later patch, we would
assign domain in pci_create_host_bridge, clean up the
pci_bus_assign_domain_nr() and move this function into
drivers/pci/host-bridge.c.

Signed-off-by: Yijing Wang <wangyijing at huawei.com>
---
 drivers/pci/pci.c |   24 +++++++++++++++++++-----
 drivers/pci/pci.h |    1 +
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index acc4b6e..95ea445 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4506,10 +4506,10 @@ int pci_get_new_domain_nr(void)
 }
 
 #ifdef CONFIG_PCI_DOMAINS_GENERIC
-void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+static int pci_assign_domain_nr(struct device *dev)
 {
 	static int use_dt_domains = -1;
-	int domain = of_get_pci_domain_nr(parent->of_node);
+	int domain = of_get_pci_domain_nr(dev->of_node);
 
 	/*
 	 * Check DT domain and use_dt_domains values.
@@ -4543,16 +4543,30 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
 		use_dt_domains = 0;
 		domain = pci_get_new_domain_nr();
 	} else {
-		dev_err(parent, "Node %s has inconsistent \"linux,pci-domain\" property in DT\n",
-			parent->of_node->full_name);
+		dev_err(dev, "Node %s has inconsistent \"linux,pci-domain\" property in DT\n",
+			dev->of_node->full_name);
 		domain = -1;
 	}
 
-	bus->domain_nr = domain;
+	return domain;
+}
+
+void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+{
+	bus->domain_nr = pci_assign_domain_nr(parent);
 }
 #endif
 #endif
 
+void pci_host_assign_domain_nr(struct pci_host_bridge *host, int domain)
+{
+#ifdef CONFIG_PCI_DOMAINS_GENERIC
+	host->domain = pci_assign_domain_nr(host->dev.parent);
+#else
+	host->domain = domain;
+#endif
+}
+
 /**
  * pci_ext_cfg_avail - can we access extended PCI config space?
  *
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index dbf1ac0..1e291e4 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -332,4 +332,5 @@ static inline void pci_bus_assign_domain_nr(struct pci_bus *bus,
 }
 #endif
 
+void pci_host_assign_domain_nr(struct pci_host_bridge *host, int domain);
 #endif /* DRIVERS_PCI_H */
-- 
1.7.1