diff options
Diffstat (limited to 'drivers/pci/bus.c')
-rw-r--r-- | drivers/pci/bus.c | 87 |
1 files changed, 51 insertions, 36 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 999cc40..52b54f0 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -71,7 +71,7 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, } /** - * add a single device + * pci_bus_add_device - add a single device * @dev: device to add * * This adds a single pci device to the global @@ -91,6 +91,37 @@ int pci_bus_add_device(struct pci_dev *dev) } /** + * pci_bus_add_child - add a child bus + * @bus: bus to add + * + * This adds sysfs entries for a single bus + */ +int pci_bus_add_child(struct pci_bus *bus) +{ + int retval; + + if (bus->bridge) + bus->dev.parent = bus->bridge; + + retval = device_register(&bus->dev); + if (retval) + return retval; + + bus->is_added = 1; + + retval = device_create_file(&bus->dev, &dev_attr_cpuaffinity); + if (retval) + return retval; + + retval = device_create_file(&bus->dev, &dev_attr_cpulistaffinity); + + /* Create legacy_io and legacy_mem files for this bus */ + pci_create_legacy_files(bus); + + return retval; +} + +/** * pci_bus_add_devices - insert newly discovered PCI devices * @bus: bus to check for new devices * @@ -105,7 +136,7 @@ int pci_bus_add_device(struct pci_dev *dev) void pci_bus_add_devices(struct pci_bus *bus) { struct pci_dev *dev; - struct pci_bus *child_bus; + struct pci_bus *child; int retval; list_for_each_entry(dev, &bus->devices, bus_list) { @@ -120,45 +151,29 @@ void pci_bus_add_devices(struct pci_bus *bus) list_for_each_entry(dev, &bus->devices, bus_list) { BUG_ON(!dev->is_added); + child = dev->subordinate; /* * If there is an unattached subordinate bus, attach * it and then scan for unattached PCI devices. */ - if (dev->subordinate) { - if (list_empty(&dev->subordinate->node)) { - down_write(&pci_bus_sem); - list_add_tail(&dev->subordinate->node, - &dev->bus->children); - up_write(&pci_bus_sem); - } - pci_bus_add_devices(dev->subordinate); - - /* register the bus with sysfs as the parent is now - * properly registered. */ - child_bus = dev->subordinate; - if (child_bus->is_added) - continue; - child_bus->dev.parent = child_bus->bridge; - retval = device_register(&child_bus->dev); - if (retval) - dev_err(&dev->dev, "Error registering pci_bus," - " continuing...\n"); - else { - child_bus->is_added = 1; - retval = device_create_file(&child_bus->dev, - &dev_attr_cpuaffinity); - } - if (retval) - dev_err(&dev->dev, "Error creating cpuaffinity" - " file, continuing...\n"); - - retval = device_create_file(&child_bus->dev, - &dev_attr_cpulistaffinity); - if (retval) - dev_err(&dev->dev, - "Error creating cpulistaffinity" - " file, continuing...\n"); + if (!child) + continue; + if (list_empty(&child->node)) { + down_write(&pci_bus_sem); + list_add_tail(&child->node, &dev->bus->children); + up_write(&pci_bus_sem); } + pci_bus_add_devices(child); + + /* + * register the bus with sysfs as the parent is now + * properly registered. + */ + if (child->is_added) + continue; + retval = pci_bus_add_child(child); + if (retval) + dev_err(&dev->dev, "Error adding bus, continuing\n"); } } |