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authorBjorn Helgaas <bjorn.helgaas@hp.com>2009-02-17 14:00:55 -0700
committerLen Brown <len.brown@intel.com>2009-03-17 01:53:29 -0400
commit5f0dccaa81e239477413d0def1133850530f1bbe (patch)
treee1b07674a092d1ba39beada0c333e2be386f07b4 /drivers/acpi/pci_link.c
parent6eca4b4ca168981d7648be371945c2a21f463a45 (diff)
ACPI: pci_link: simplify list of link devices
We don't need a struct containing a count and a list_head; a simple list_head is sufficient. The list iterators handle empty lists fine. Furthermore, we don't need to check for null list entries because we only add non-null entries. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/pci_link.c')
-rw-r--r--drivers/acpi/pci_link.c32
1 files changed, 6 insertions, 26 deletions
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index dd9ebb9fda42..16e0f9d3d17c 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -86,16 +86,13 @@ struct acpi_pci_link_irq {
};
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);
/* --------------------------------------------------------------------------
@@ -479,19 +476,13 @@ static int acpi_irq_penalty[ACPI_MAX_IRQS] = {
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 --
@@ -743,9 +734,7 @@ static int acpi_pci_link_add(struct acpi_device *device)
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 */
@@ -768,15 +757,9 @@ static int acpi_pci_link_resume(struct acpi_pci_link *link)
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;
@@ -789,7 +772,7 @@ static int acpi_pci_link_remove(struct acpi_device *device, int type)
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);
@@ -926,9 +909,6 @@ static int __init acpi_pci_link_init(void)
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;