PCI: cleanup pci_bus_add_devices()
Cleanup pci_bus_add_devices() by negating the conditional and
continuing, rather than having a single conditional take up the whole
body.
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 3e1c135..1b6de1b 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -71,7 +71,7 @@
}
/**
- * 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
@@ -105,7 +105,7 @@
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) {
@@ -120,39 +120,40 @@
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);
+ 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. */
- 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);
- }
+ /*
+ * register the bus with sysfs as the parent is now
+ * properly registered.
+ */
+ if (child->is_added)
+ continue;
+ child->dev.parent = child->bridge;
+ retval = device_register(&child->dev);
+ if (retval)
+ dev_err(&dev->dev, "Error registering pci_bus,"
+ " continuing...\n");
+ else {
+ child->is_added = 1;
+ retval = device_create_file(&child->dev,
+ &dev_attr_cpuaffinity);
if (retval)
dev_err(&dev->dev, "Error creating cpuaffinity"
" file, continuing...\n");
- retval = device_create_file(&child_bus->dev,
+ retval = device_create_file(&child->dev,
&dev_attr_cpulistaffinity);
if (retval)
dev_err(&dev->dev,