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[4/8] PCI, ACPI: assign unassigned resource for hot add root bus

Message ID 1351618965-16761-5-git-send-email-yinghai@kernel.org
State Accepted
Headers show

Commit Message

Yinghai Lu Oct. 30, 2012, 5:42 p.m. UTC 
After we get hot-added ioapic registered.
pci_enable_bridges will try to enable ioapic irq for pci bridges.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 drivers/acpi/pci_root.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
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Patch

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index bce469c..27adbfd 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -644,12 +644,19 @@  static int acpi_pci_root_start(struct acpi_device *device)
 	struct acpi_pci_root *root = acpi_driver_data(device);
 	struct acpi_pci_driver *driver;
 
+	if (system_state != SYSTEM_BOOTING)
+		pci_assign_unassigned_bus_resources(root->bus);
+
 	mutex_lock(&acpi_pci_root_lock);
 	list_for_each_entry(driver, &acpi_pci_drivers, node)
 		if (driver->add)
 			driver->add(root);
 	mutex_unlock(&acpi_pci_root_lock);
 
+	/* need to after hot-added ioapic is registered */
+	if (system_state != SYSTEM_BOOTING)
+		pci_enable_bridges(root->bus);
+
 	pci_bus_add_devices(root->bus);
 
 	return 0;