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Subject[PATCH 07/21] PCI: Make pci_rescan_bus handle add_list
Date
So it will allocate resource to hotplug bridge during remove/rescan.

Need to move that function to setup-bus.c so it could use
__pci_bus_size_bridges and __pci_bus_assign_resources
directly to take add_list.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/pci/probe.c | 32 --------------------------------
drivers/pci/setup-bus.c | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+), 32 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 24c8710..7232fc8 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1631,38 +1631,6 @@ unsigned int __ref pci_rescan_bus_bridge_resize(struct pci_dev *bridge)
return max;
}

-/**
- * pci_rescan_bus - scan a PCI bus for devices.
- * @bus: PCI bus to scan
- *
- * Scan a PCI bus and child buses for new devices, adds them,
- * and enables them.
- *
- * Returns the max number of subordinate bus discovered.
- */
-unsigned int __ref pci_rescan_bus(struct pci_bus *bus)
-{
- unsigned int max;
- struct pci_dev *dev;
-
- max = pci_scan_child_bus(bus);
-
- down_read(&pci_bus_sem);
- list_for_each_entry(dev, &bus->devices, bus_list)
- if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
- dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
- if (dev->subordinate)
- pci_bus_size_bridges(dev->subordinate);
- up_read(&pci_bus_sem);
-
- pci_bus_assign_resources(bus);
- pci_enable_bridges(bus);
- pci_bus_add_devices(bus);
-
- return max;
-}
-EXPORT_SYMBOL_GPL(pci_rescan_bus);
-
EXPORT_SYMBOL(pci_add_new_bus);
EXPORT_SYMBOL(pci_scan_slot);
EXPORT_SYMBOL(pci_scan_bridge);
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 97c1eda..c09c67a 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1357,3 +1357,42 @@ enable_all:
pci_enable_bridges(parent);
}
EXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources);
+
+#ifdef CONFIG_HOTPLUG
+/**
+ * pci_rescan_bus - scan a PCI bus for devices.
+ * @bus: PCI bus to scan
+ *
+ * Scan a PCI bus and child buses for new devices, adds them,
+ * and enables them.
+ *
+ * Returns the max number of subordinate bus discovered.
+ */
+unsigned int __ref pci_rescan_bus(struct pci_bus *bus)
+{
+ unsigned int max;
+ struct pci_dev *dev;
+ struct resource_list_x add_list; /* list of resources that
+ want additional resources */
+
+ max = pci_scan_child_bus(bus);
+
+ add_list.next = NULL;
+ down_read(&pci_bus_sem);
+ list_for_each_entry(dev, &bus->devices, bus_list)
+ if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
+ dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
+ if (dev->subordinate)
+ __pci_bus_size_bridges(dev->subordinate,
+ &add_list);
+ up_read(&pci_bus_sem);
+ __pci_bus_assign_resources(bus, &add_list, NULL);
+ BUG_ON(add_list.next);
+
+ pci_enable_bridges(bus);
+ pci_bus_add_devices(bus);
+
+ return max;
+}
+EXPORT_SYMBOL_GPL(pci_rescan_bus);
+#endif
--
1.7.7


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