[PATCH part4 03/11] PCI: Add pci_stop_and_remove_bus()

Yinghai Lu
2012-09-02T21:54:13Z

It supports both pci root bus and pci bus under pci bridge.

-v2: clear pci_bridge's subordinate.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/pci/remove.c | 32 ++++++++++++++++++++++++++++++++
include/linux/pci.h | 1 +
2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index b9f553b..94407d4 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -136,3 +136,35 @@ void pci_stop_and_remove_behind_bridge(struct pci_dev *dev)
if (dev->subordinate)
pci_remove_bus_devices(dev->subordinate);
}
+
+static void pci_stop_host_bridge(struct pci_host_bridge *bridge)
+{
+ device_unregister(&bridge->dev);
+}
+/*
+ * it will support pci root bus too, in that case we need
+ * stop and remove host bridge
+ */
+void pci_stop_and_remove_bus(struct pci_bus *bus)
+{
+ struct pci_host_bridge *host_bridge = NULL;
+ struct pci_dev *pci_bridge = NULL;
+
+ pci_stop_bus_devices(bus);
+
+ if (pci_is_root_bus(bus)) {
+ host_bridge = to_pci_host_bridge(bus->bridge);
+ pci_stop_host_bridge(host_bridge);
+ } else
+ pci_bridge = bus->self;
+
+ pci_remove_bus_devices(bus);
+
+ pci_remove_bus(bus);
+
+ if (host_bridge)
+ host_bridge->bus = NULL;
+
+ if (pci_bridge)
+ pci_bridge->subordinate = NULL;
+}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 4446448..8b2c722 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -738,6 +738,7 @@ extern void pci_remove_bus(struct pci_bus *b);
extern void pci_stop_and_remove_bus_device(struct pci_dev *dev);
void pci_stop_bus_devices(struct pci_bus *bus);
void pci_stop_and_remove_behind_bridge(struct pci_dev *dev);
+void pci_stop_and_remove_bus(struct pci_bus *bus);
void pci_setup_cardbus(struct pci_bus *bus);
extern void pci_sort_breadthfirst(void);
#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
--
1.7.7