x86: voluntary leave_mm before entering ACPI C3

[safe/jmp/linux-2.6] / drivers / acpi / pci_link.c

diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 1badce2..5400ea1 100644 (file)
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -44,10 +44,8 @@
 #include <acpi/acpi_drivers.h>
 
 #define _COMPONENT             ACPI_PCI_COMPONENT
-ACPI_MODULE_NAME("pci_link")
+ACPI_MODULE_NAME("pci_link");
 #define ACPI_PCI_LINK_CLASS            "pci_irq_routing"
-#define ACPI_PCI_LINK_HID              "PNP0C0F"
-#define ACPI_PCI_LINK_DRIVER_NAME      "ACPI PCI Interrupt Link Driver"
 #define ACPI_PCI_LINK_DEVICE_NAME      "PCI Interrupt Link"
 #define ACPI_PCI_LINK_FILE_INFO                "info"
 #define ACPI_PCI_LINK_FILE_STATUS      "state"
@@ -55,10 +53,16 @@ ACPI_MODULE_NAME("pci_link")
 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[] = {
+       {"PNP0C0F", 0},
+       {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, link_device_ids);
+
 static struct acpi_driver acpi_pci_link_driver = {
-       .name = ACPI_PCI_LINK_DRIVER_NAME,
+       .name = "pci_link",
        .class = ACPI_PCI_LINK_CLASS,
-       .ids = ACPI_PCI_LINK_HID,
+       .ids = link_device_ids,
        .ops = {
                .add = acpi_pci_link_add,
                .remove = acpi_pci_link_remove,
@@ -83,7 +87,6 @@ struct acpi_pci_link_irq {
 struct acpi_pci_link {
        struct list_head node;
        struct acpi_device *device;
-       acpi_handle handle;
        struct acpi_pci_link_irq irq;
        int refcnt;
 };
@@ -104,7 +107,7 @@ DEFINE_MUTEX(acpi_link_lock);
 static acpi_status
 acpi_pci_link_check_possible(struct acpi_resource *resource, void *context)
 {
-       struct acpi_pci_link *link = (struct acpi_pci_link *)context;
+       struct acpi_pci_link *link = context;
        u32 i = 0;
 
 
@@ -175,7 +178,7 @@ static int acpi_pci_link_get_possible(struct acpi_pci_link *link)
        if (!link)
                return -EINVAL;
 
-       status = acpi_walk_resources(link->handle, METHOD_NAME__PRS,
+       status = acpi_walk_resources(link->device->handle, METHOD_NAME__PRS,
                                     acpi_pci_link_check_possible, link);
        if (ACPI_FAILURE(status)) {
                ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRS"));
@@ -249,8 +252,7 @@ static int acpi_pci_link_get_current(struct acpi_pci_link *link)
        acpi_status status = AE_OK;
        int irq = 0;
 
-
-       if (!link || !link->handle)
+       if (!link)
                return -EINVAL;
 
        link->irq.active = 0;
@@ -274,7 +276,7 @@ static int acpi_pci_link_get_current(struct acpi_pci_link *link)
         * Query and parse _CRS to get the current IRQ assignment. 
         */
 
-       status = acpi_walk_resources(link->handle, METHOD_NAME__CRS,
+       status = acpi_walk_resources(link->device->handle, METHOD_NAME__CRS,
                                     acpi_pci_link_check_current, &irq);
        if (ACPI_FAILURE(status)) {
                ACPI_EXCEPTION((AE_INFO, status, "Evaluating _CRS"));
@@ -309,11 +311,10 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
        if (!link || !irq)
                return -EINVAL;
 
-       resource = kmalloc(sizeof(*resource) + 1, GFP_ATOMIC);
+       resource = kzalloc(sizeof(*resource) + 1, irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL);
        if (!resource)
                return -ENOMEM;
 
-       memset(resource, 0, sizeof(*resource) + 1);
        buffer.length = sizeof(*resource) + 1;
        buffer.pointer = resource;
 
@@ -360,7 +361,7 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
        resource->end.type = ACPI_RESOURCE_TYPE_END_TAG;
 
        /* Attempt to set the resource */
-       status = acpi_set_current_resources(link->handle, &buffer);
+       status = acpi_set_current_resources(link->device->handle, &buffer);
 
        /* check for total failure */
        if (ACPI_FAILURE(status)) {
@@ -516,7 +517,7 @@ int __init acpi_irq_penalty_init(void)
                }
        }
        /* Add a penalty for the SCI */
-       acpi_irq_penalty[acpi_fadt.sci_int] += PIRQ_PENALTY_PCI_USING;
+       acpi_irq_penalty[acpi_gbl_FADT.sci_interrupt] += PIRQ_PENALTY_PCI_USING;
 
        return 0;
 }
@@ -615,7 +616,7 @@ acpi_pci_link_allocate_irq(acpi_handle handle,
                return -1;
        }
 
-       link = (struct acpi_pci_link *)acpi_driver_data(device);
+       link = acpi_driver_data(device);
        if (!link) {
                printk(KERN_ERR PREFIX "Invalid link context\n");
                return -1;
@@ -670,7 +671,7 @@ int acpi_pci_link_free_irq(acpi_handle handle)
                return -1;
        }
 
-       link = (struct acpi_pci_link *)acpi_driver_data(device);
+       link = acpi_driver_data(device);
        if (!link) {
                printk(KERN_ERR PREFIX "Invalid link context\n");
                return -1;
@@ -699,7 +700,7 @@ int acpi_pci_link_free_irq(acpi_handle handle)
                          acpi_device_bid(link->device)));
 
        if (link->refcnt == 0) {
-               acpi_ut_evaluate_object(link->handle, "_DIS", 0, NULL);
+               acpi_ut_evaluate_object(link->device->handle, "_DIS", 0, NULL);
        }
        mutex_unlock(&acpi_link_lock);
        return (link->irq.active);
@@ -720,13 +721,11 @@ static int acpi_pci_link_add(struct acpi_device *device)
        if (!device)
                return -EINVAL;
 
-       link = kmalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
+       link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
        if (!link)
                return -ENOMEM;
-       memset(link, 0, sizeof(struct acpi_pci_link));
 
        link->device = device;
-       link->handle = device->handle;
        strcpy(acpi_device_name(device), ACPI_PCI_LINK_DEVICE_NAME);
        strcpy(acpi_device_class(device), ACPI_PCI_LINK_CLASS);
        acpi_driver_data(device) = link;
@@ -739,7 +738,7 @@ static int acpi_pci_link_add(struct acpi_device *device)
        /* query and set link->irq.active */
        acpi_pci_link_get_current(link);
 
-       printk(PREFIX "%s [%s] (IRQs", acpi_device_name(device),
+       printk(KERN_INFO PREFIX "%s [%s] (IRQs", acpi_device_name(device),
               acpi_device_bid(device));
        for (i = 0; i < link->irq.possible_count; i++) {
                if (link->irq.active == link->irq.possible[i]) {
@@ -765,7 +764,7 @@ static int acpi_pci_link_add(struct acpi_device *device)
 
       end:
        /* disable all links -- to be activated on use */
-       acpi_ut_evaluate_object(link->handle, "_DIS", 0, NULL);
+       acpi_ut_evaluate_object(device->handle, "_DIS", 0, NULL);
        mutex_unlock(&acpi_link_lock);
 
        if (result)
@@ -783,11 +782,6 @@ static int acpi_pci_link_resume(struct acpi_pci_link *link)
                return 0;
 }
 
-/*
- * FIXME: this is a workaround to avoid nasty warning.  It will be removed
- * after every device calls pci_disable_device in .resume.
- */
-int acpi_in_resume;
 static int irqrouter_resume(struct sys_device *dev)
 {
        struct list_head *node = NULL;
@@ -795,9 +789,8 @@ static int irqrouter_resume(struct sys_device *dev)
 
 
        /* Make sure SCI is enabled again (Apple firmware bug?) */
-       acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1, ACPI_MTX_DO_NOT_LOCK);
+       acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1);
 
-       acpi_in_resume = 1;
        list_for_each(node, &acpi_link.entries) {
                link = list_entry(node, struct acpi_pci_link, node);
                if (!link) {
@@ -806,7 +799,6 @@ static int irqrouter_resume(struct sys_device *dev)
                }
                acpi_pci_link_resume(link);
        }
-       acpi_in_resume = 0;
        return 0;
 }
 
@@ -818,7 +810,7 @@ static int acpi_pci_link_remove(struct acpi_device *device, int type)
        if (!device || !acpi_driver_data(device))
                return -EINVAL;
 
-       link = (struct acpi_pci_link *)acpi_driver_data(device);
+       link = acpi_driver_data(device);
 
        mutex_lock(&acpi_link_lock);
        list_del(&link->node);
@@ -919,7 +911,7 @@ __setup("acpi_irq_balance", acpi_irq_balance_set);
 
 /* FIXME: we will remove this interface after all drivers call pci_disable_device */
 static struct sysdev_class irqrouter_sysdev_class = {
-       set_kset_name("irqrouter"),
+       .name = "irqrouter",
        .resume = irqrouter_resume,
 };