[PATCH v9 15/30] PCI: Introduce new scan function pci_scan_host_bridge()

Yijing Wang
2015-04-03T09:25:49Z

Introduce new scan function pci_scan_host_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 | 22 ++++++++++++++++++++++
include/linux/pci.h | 3 +++
2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 36dfee0..b3d9b1b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2064,6 +2064,28 @@ static struct pci_bus *__pci_scan_root_bus(
return b;
}

+struct pci_host_bridge *pci_scan_host_bridge(
+ struct device *parent, int domain, int bus,
+ void *sysdata, struct list_head *resources,
+ struct pci_host_bridge_ops *ops)
+{
+ struct pci_host_bridge *host;
+
+ host = pci_create_host_bridge(parent, domain, bus, sysdata,
+ resources, ops);
+ if (!host)
+ return NULL;
+
+ host->bus = __pci_scan_root_bus(host, ops->pci_ops);
+ if (!host->bus) {
+ pci_free_host_bridge(host);
+ return NULL;
+ }
+
+ return host;
+}
+EXPORT_SYMBOL(pci_scan_host_bridge);
+
struct pci_bus *pci_scan_root_bus(struct device *parent, int domain,
int bus, struct pci_ops *ops, void *sysdata,
struct list_head *resources)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2702a51..7f4f182 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, int domain, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
+struct pci_host_bridge *pci_scan_host_bridge(struct device *parent, int domain,
+ int bus, void *sysdata, struct list_head *resources,
+ struct pci_host_bridge_ops *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