[PATCH v2 13/30] PCI: Introduce new scan function pci_scan_root_bridge()

Yijing Wang
2015-01-21T02:38:19Z

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@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 ca53c37..c23ca8a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2064,6 +2064,27 @@ 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 817756a..e60c59a 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -793,6 +793,9 @@ 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