[PATCH 12/28] PCI: Introduce new scan function pci_scan_root_bridge()

[Yijing Wang]

Introduce new scan function pci_scan_root_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>
---
 drivers/pci/probe.c |   21 +++++++++++++++++++++
 include/linux/pci.h |    3 +++
 2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 5f748ed..51d69c3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2068,6 +2068,27 @@ static struct pci_bus *__pci_scan_root_bus(
 	return b;
 }
 
+struct pci_host_bridge *pci_scan_root_bridge(struct device *parent,
+		u32 db, struct pci_ops *ops, void *sysdata,
+		struct list_head *resources, struct pci_host_bridge_ops *phb_ops)
+{
+	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_root_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 c06b95d..5592737 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -797,6 +797,9 @@ 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_root_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