From 62a08c5a3173c4462239804b959c0d29dc74493b Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Tue, 30 Oct 2012 14:31:32 -0600 Subject: [PATCH] PCI/ACPI: Assign unassigned resource for hot-added root bus After we get hot-added IOAPIC registered. pci_enable_bridges() will try to enable IOAPIC IRQ for PCI bridges. Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas Acked-by: Rafael J. Wysocki --- drivers/acpi/pci_root.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index bce469c0b48a..27adbfdffb0c 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; -- 2.20.1