#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#define PREFIX "ACPI: "
+
#define _COMPONENT ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_link");
#define ACPI_PCI_LINK_CLASS "pci_irq_routing"
static int acpi_pci_link_add(struct acpi_device *device);
static int acpi_pci_link_remove(struct acpi_device *device, int type);
-static struct acpi_device_id link_device_ids[] = {
+static const struct acpi_device_id link_device_ids[] = {
{"PNP0C0F", 0},
{"", 0},
};
};
struct acpi_pci_link {
- struct list_head node;
+ struct list_head list;
struct acpi_device *device;
struct acpi_pci_link_irq irq;
int refcnt;
};
-static struct {
- int count;
- struct list_head entries;
-} acpi_link;
+static LIST_HEAD(acpi_link_list);
static DEFINE_MUTEX(acpi_link_lock);
/* --------------------------------------------------------------------------
{
acpi_status status;
- if (!link)
- return -EINVAL;
-
status = acpi_walk_resources(link->device->handle, METHOD_NAME__PRS,
acpi_pci_link_check_possible, link);
if (ACPI_FAILURE(status)) {
acpi_status status;
int irq = 0;
- if (!link)
- return -EINVAL;
-
link->irq.active = 0;
/* in practice, status disabled is meaningless, ignore it */
} *resource;
struct acpi_buffer buffer = { 0, NULL };
- if (!link || !irq)
+ if (!irq)
return -EINVAL;
resource = kzalloc(sizeof(*resource) + 1, irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL);
int __init acpi_irq_penalty_init(void)
{
- struct list_head *node;
struct acpi_pci_link *link;
int i;
/*
* Update penalties to facilitate IRQ balancing.
*/
- list_for_each(node, &acpi_link.entries) {
- link = list_entry(node, struct acpi_pci_link, node);
- if (!link) {
- printk(KERN_ERR PREFIX "Invalid link context\n");
- continue;
- }
+ list_for_each_entry(link, &acpi_link_list, list) {
/*
* reflect the possible and active irqs in the penalty table --
int i;
int found = 0;
- if (!device)
- return -EINVAL;
-
link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
if (!link)
return -ENOMEM;
printk("\n");
- /* TBD: Acquire/release lock */
- list_add_tail(&link->node, &acpi_link.entries);
- acpi_link.count++;
+ list_add_tail(&link->list, &acpi_link_list);
end:
/* disable all links -- to be activated on use */
static int irqrouter_resume(struct sys_device *dev)
{
- struct list_head *node;
struct acpi_pci_link *link;
- list_for_each(node, &acpi_link.entries) {
- link = list_entry(node, struct acpi_pci_link, node);
- if (!link) {
- printk(KERN_ERR PREFIX "Invalid link context\n");
- continue;
- }
+ list_for_each_entry(link, &acpi_link_list, list) {
acpi_pci_link_resume(link);
}
return 0;
{
struct acpi_pci_link *link;
- if (!device || !acpi_driver_data(device))
- return -EINVAL;
-
link = acpi_driver_data(device);
mutex_lock(&acpi_link_lock);
- list_del(&link->node);
+ list_del(&link->list);
mutex_unlock(&acpi_link_lock);
kfree(link);
acpi_irq_balance = 0;
}
- acpi_link.count = 0;
- INIT_LIST_HEAD(&acpi_link.entries);
-
if (acpi_bus_register_driver(&acpi_pci_link_driver) < 0)
return -ENODEV;