From 47525cda88f5cc4dbe24de1cc05617c08e2d7c4a Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Fri, 21 Dec 2012 00:36:45 +0100 Subject: [PATCH] ACPI / PCI: Fold acpi_pci_root_start() into acpi_pci_root_add() Move the code from the ACPI PCI root bridge's .start() callback routine, acpi_pci_root_start(), directly into acpi_pci_root_add() and drop acpi_pci_root_start(). It is safe to do that, because it is now always guaranteed that when struct pci_dev objects are created, their companion struct acpi_device objects are already present, so it is not necessary to wait for them to be created before calling pci_bus_add_devices(). This change was previously proposed in a different form by Yinghai Lu. Signed-off-by: Rafael J. Wysocki Acked-by: Yinghai Lu Acked-by: Toshi Kani --- drivers/acpi/pci_root.c | 32 +++++++++++--------------------- 1 file changed, 11 insertions(+), 21 deletions(-) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index a233fe93dfac..0e593a203ff8 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -47,7 +47,6 @@ ACPI_MODULE_NAME("pci_root"); #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" static int acpi_pci_root_add(struct acpi_device *device); static int acpi_pci_root_remove(struct acpi_device *device, int type); -static int acpi_pci_root_start(struct acpi_device *device); #define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \ | OSC_ACTIVE_STATE_PWR_SUPPORT \ @@ -67,7 +66,6 @@ static struct acpi_driver acpi_pci_root_driver = { .ops = { .add = acpi_pci_root_add, .remove = acpi_pci_root_remove, - .start = acpi_pci_root_start, }, }; @@ -453,6 +451,7 @@ static int acpi_pci_root_add(struct acpi_device *device) struct acpi_pci_root *root; acpi_handle handle; struct acpi_device *child; + struct acpi_pci_driver *driver; u32 flags, base_flags; bool is_osc_granted = false; @@ -632,24 +631,6 @@ static int acpi_pci_root_add(struct acpi_device *device) if (device->wakeup.flags.run_wake) device_set_run_wake(root->bus->bridge, true); - return 0; - -out_del_root: - mutex_lock(&acpi_pci_root_lock); - list_del(&root->node); - mutex_unlock(&acpi_pci_root_lock); - - acpi_pci_irq_del_prt(root->segment, root->secondary.start); -end: - kfree(root); - return result; -} - -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); @@ -664,8 +645,17 @@ static int acpi_pci_root_start(struct acpi_device *device) pci_enable_bridges(root->bus); pci_bus_add_devices(root->bus); - return 0; + +out_del_root: + mutex_lock(&acpi_pci_root_lock); + list_del(&root->node); + mutex_unlock(&acpi_pci_root_lock); + + acpi_pci_irq_del_prt(root->segment, root->secondary.start); +end: + kfree(root); + return result; } static int acpi_pci_root_remove(struct acpi_device *device, int type) -- 2.20.1