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authorBjorn Helgaas <bhelgaas@google.com>2012-11-09 10:00:02 -0700
committerBjorn Helgaas <bhelgaas@google.com>2012-11-09 10:00:02 -0700
commitfa20f6f240e127bc914ca980a4b10c723c55fec9 (patch)
tree1a8267f53240b763a9d555a410341c3d7e432721 /drivers/pci
parent13a84687092f47a6d67b1b17940eb3127ae888b3 (diff)
parentf426cef3bc58806284e0fee55d29262b10279f9c (diff)
downloadop-kernel-dev-fa20f6f240e127bc914ca980a4b10c723c55fec9.zip
op-kernel-dev-fa20f6f240e127bc914ca980a4b10c723c55fec9.tar.gz
Merge branch 'pci/yinghai-for-pci-root-bus-hotplug' into next
* pci/yinghai-for-pci-root-bus-hotplug: PCI/ACPI: Remove acpi_root_driver in reverse order PCI/ACPI: Delete host bridge _PRT during hot remove path PCI/ACPI: Make acpi_pci_root_remove() stop/remove pci root bus PCI: Add pci_stop_and_remove_root_bus() PCI/ACPI: Assign unassigned resource for hot-added root bus PCI: Move out pci_enable_bridges out of assign_unsigned_bus_res PCI: Move pci_rescan_bus() back to probe.c PCI: Separate out pci_assign_unassigned_bus_resources()
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/probe.c22
-rw-r--r--drivers/pci/remove.c36
-rw-r--r--drivers/pci/setup-bus.c22
3 files changed, 59 insertions, 21 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ec909af..59cf1ba 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1890,6 +1890,28 @@ 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;
+
+ max = pci_scan_child_bus(bus);
+ pci_assign_unassigned_bus_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/remove.c b/drivers/pci/remove.c
index 513972f..7c0fd92 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -111,3 +111,39 @@ void pci_stop_and_remove_bus_device(struct pci_dev *dev)
pci_remove_bus_device(dev);
}
EXPORT_SYMBOL(pci_stop_and_remove_bus_device);
+
+void pci_stop_root_bus(struct pci_bus *bus)
+{
+ struct pci_dev *child, *tmp;
+ struct pci_host_bridge *host_bridge;
+
+ if (!pci_is_root_bus(bus))
+ return;
+
+ host_bridge = to_pci_host_bridge(bus->bridge);
+ list_for_each_entry_safe_reverse(child, tmp,
+ &bus->devices, bus_list)
+ pci_stop_bus_device(child);
+
+ /* stop the host bridge */
+ device_del(&host_bridge->dev);
+}
+
+void pci_remove_root_bus(struct pci_bus *bus)
+{
+ struct pci_dev *child, *tmp;
+ struct pci_host_bridge *host_bridge;
+
+ if (!pci_is_root_bus(bus))
+ return;
+
+ host_bridge = to_pci_host_bridge(bus->bridge);
+ list_for_each_entry_safe(child, tmp,
+ &bus->devices, bus_list)
+ pci_remove_bus_device(child);
+ pci_remove_bus(bus);
+ host_bridge->bus = NULL;
+
+ /* remove the host bridge */
+ put_device(&host_bridge->dev);
+}
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 1e808ca..6d3591d 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1550,25 +1550,12 @@ enable_all:
}
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)
+void pci_assign_unassigned_bus_resources(struct pci_bus *bus)
{
- unsigned int max;
struct pci_dev *dev;
LIST_HEAD(add_list); /* list of resources that
want additional resources */
- 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 ||
@@ -1579,11 +1566,4 @@ unsigned int __ref pci_rescan_bus(struct pci_bus *bus)
up_read(&pci_bus_sem);
__pci_bus_assign_resources(bus, &add_list, NULL);
BUG_ON(!list_empty(&add_list));
-
- pci_enable_bridges(bus);
- pci_bus_add_devices(bus);
-
- return max;
}
-EXPORT_SYMBOL_GPL(pci_rescan_bus);
-#endif
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