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author | Bjorn Helgaas <bhelgaas@google.com> | 2012-11-09 17:00:02 (GMT) |
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committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-11-09 17:00:02 (GMT) |
commit | fa20f6f240e127bc914ca980a4b10c723c55fec9 (patch) | |
tree | 1a8267f53240b763a9d555a410341c3d7e432721 /drivers/pci | |
parent | 13a84687092f47a6d67b1b17940eb3127ae888b3 (diff) | |
parent | f426cef3bc58806284e0fee55d29262b10279f9c (diff) | |
download | linux-fa20f6f240e127bc914ca980a4b10c723c55fec9.tar.xz |
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.c | 22 | ||||
-rw-r--r-- | drivers/pci/remove.c | 36 | ||||
-rw-r--r-- | drivers/pci/setup-bus.c | 22 |
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 |