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ACPI: pci_root: simplify list traversals 

Using list_for_each_entry() makes traversing the root list easier.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Reviewed-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-06-18 14:47:02 -06:00 committed by Len Brown
parent caf420c68a
commit c1aec83416
1 changed files with 9 additions and 14 deletions
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23
drivers/acpi/pci_root.c
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@ -82,7 +82,7 @@ static DEFINE_MUTEX(osc_lock);
int acpi_pci_register_driver(struct acpi_pci_driver *driver)
{
int n = 0;
struct list_head *entry;
struct acpi_pci_root *root;
struct acpi_pci_driver **pptr = &sub_driver;
while (*pptr)
@ -92,9 +92,7 @@ int acpi_pci_register_driver(struct acpi_pci_driver *driver)
if (!driver->add)
return 0;
list_for_each(entry, &acpi_pci_roots) {
struct acpi_pci_root *root;
root = list_entry(entry, struct acpi_pci_root, node);
list_for_each_entry(root, &acpi_pci_roots, node) {
driver->add(root->device->handle);
n++;
}
@ -106,7 +104,7 @@ EXPORT_SYMBOL(acpi_pci_register_driver);
void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
{
struct list_head *entry;
struct acpi_pci_root *root;
struct acpi_pci_driver **pptr = &sub_driver;
while (*pptr) {
@ -120,23 +118,19 @@ void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
if (!driver->remove)
return;
list_for_each(entry, &acpi_pci_roots) {
struct acpi_pci_root *root;
root = list_entry(entry, struct acpi_pci_root, node);
list_for_each_entry(root, &acpi_pci_roots, node)
driver->remove(root->device->handle);
}
}
EXPORT_SYMBOL(acpi_pci_unregister_driver);
acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus)
{
struct acpi_pci_root *tmp;
struct acpi_pci_root *root;
list_for_each_entry(tmp, &acpi_pci_roots, node) {
if ((tmp->id.segment == (u16) seg) && (tmp->id.bus == (u16) bus))
return tmp->device->handle;
}
list_for_each_entry(root, &acpi_pci_roots, node)
if ((root->id.segment == (u16) seg) && (root->id.bus == (u16) bus))
return root->device->handle;
return NULL;
}
@ -301,6 +295,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
{
struct acpi_pci_root *root;
list_for_each_entry(root, &acpi_pci_roots, node) {
if (root->device->handle == handle)
return root;