/home/lenb/src/to-linus branch 'acpi-2.6.12'

6 files changed, 634 insertions, 309 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 986410e7b483..ba13896cae40 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -133,9 +133,10 @@ config ACPI_HOTKEY
         depends on ACPI_INTERPRETER
         depends on EXPERIMENTAL
         depends on !IA64_SGI_SN
-        default m
+        default n
         help
-        ACPI generic hotkey
+          Experimental consolidated hotkey driver.
+          If you are unsure, say N.
 
 config ACPI_FAN
         tristate "Fan"
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 0f45d45f05a0..8162fd0c21a7 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -26,6 +26,9 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
@@ -33,6 +36,9 @@
 #define ACPI_BUTTON_COMPONENT           0x00080000
 #define ACPI_BUTTON_DRIVER_NAME         "ACPI Button Driver"
 #define ACPI_BUTTON_CLASS               "button"
+#define ACPI_BUTTON_FILE_INFO           "info"
+#define ACPI_BUTTON_FILE_STATE          "state"
+#define ACPI_BUTTON_TYPE_UNKNOWN        0x00
 #define ACPI_BUTTON_NOTIFY_STATUS       0x80
 
 #define ACPI_BUTTON_SUBCLASS_POWER      "power"
@@ -64,6 +70,8 @@ MODULE_LICENSE("GPL");
 
 static int acpi_button_add (struct acpi_device *device);
 static int acpi_button_remove (struct acpi_device *device, int type);
+static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
+static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
 
 static struct acpi_driver acpi_button_driver = {
         .name =         ACPI_BUTTON_DRIVER_NAME,
@@ -82,6 +90,179 @@ struct acpi_button {
         unsigned long           pushed;
 };
 
+static struct file_operations acpi_button_info_fops = {
+        .open           = acpi_button_info_open_fs,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static struct file_operations acpi_button_state_fops = {
+        .open           = acpi_button_state_open_fs,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+/* --------------------------------------------------------------------------
+                              FS Interface (/proc)
+   -------------------------------------------------------------------------- */
+
+static struct proc_dir_entry    *acpi_button_dir;
+
+static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
+{
+        struct acpi_button      *button = (struct acpi_button *) seq->private;
+
+        ACPI_FUNCTION_TRACE("acpi_button_info_seq_show");
+
+        if (!button || !button->device)
+                return_VALUE(0);
+
+        seq_printf(seq, "type:                    %s\n", 
+                acpi_device_name(button->device));
+
+        return_VALUE(0);
+}
+
+static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
+{
+        return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
+}
+        
+static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
+{
+        struct acpi_button      *button = (struct acpi_button *) seq->private;
+        acpi_status             status;
+        unsigned long           state;
+
+        ACPI_FUNCTION_TRACE("acpi_button_state_seq_show");
+
+        if (!button || !button->device)
+                return_VALUE(0);
+
+        status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state);
+        if (ACPI_FAILURE(status)) {
+                seq_printf(seq, "state:      unsupported\n");
+        }
+        else{
+                seq_printf(seq, "state:      %s\n", (state ? "open" : "closed")); 
+        }
+
+        return_VALUE(0);
+}
+
+static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
+{
+        return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
+}
+
+static struct proc_dir_entry *acpi_power_dir;
+static struct proc_dir_entry *acpi_sleep_dir;
+static struct proc_dir_entry *acpi_lid_dir;
+
+static int
+acpi_button_add_fs (
+        struct acpi_device      *device)
+{
+        struct proc_dir_entry   *entry = NULL;
+        struct acpi_button      *button = NULL;
+
+        ACPI_FUNCTION_TRACE("acpi_button_add_fs");
+
+        if (!device || !acpi_driver_data(device))
+                return_VALUE(-EINVAL);
+
+        button = acpi_driver_data(device);
+
+        switch (button->type) {
+        case ACPI_BUTTON_TYPE_POWER:
+        case ACPI_BUTTON_TYPE_POWERF:
+                if (!acpi_power_dir)
+                        acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, 
+                                acpi_button_dir);
+                entry = acpi_power_dir;
+                break;
+        case ACPI_BUTTON_TYPE_SLEEP:
+        case ACPI_BUTTON_TYPE_SLEEPF:
+                if (!acpi_sleep_dir)
+                        acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, 
+                                acpi_button_dir);
+                entry = acpi_sleep_dir;
+                break;
+        case ACPI_BUTTON_TYPE_LID:
+                if (!acpi_lid_dir)
+                        acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, 
+                                acpi_button_dir);
+                entry = acpi_lid_dir;
+                break;
+        }
+
+        if (!entry)
+                return_VALUE(-ENODEV);
+        entry->owner = THIS_MODULE;
+
+        acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
+        if (!acpi_device_dir(device))
+                return_VALUE(-ENODEV);
+        acpi_device_dir(device)->owner = THIS_MODULE;
+
+        /* 'info' [R] */
+        entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
+                S_IRUGO, acpi_device_dir(device));
+        if (!entry)
+                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+                        "Unable to create '%s' fs entry\n",
+                        ACPI_BUTTON_FILE_INFO));
+        else {
+                entry->proc_fops = &acpi_button_info_fops;
+                entry->data = acpi_driver_data(device);
+                entry->owner = THIS_MODULE;
+        }
+
+        /* show lid state [R] */
+        if (button->type == ACPI_BUTTON_TYPE_LID) {
+                entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
+                        S_IRUGO, acpi_device_dir(device));
+                if (!entry)
+                        ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+                                "Unable to create '%s' fs entry\n",
+                                ACPI_BUTTON_FILE_INFO));
+                else {
+                        entry->proc_fops = &acpi_button_state_fops;
+                        entry->data = acpi_driver_data(device);
+                        entry->owner = THIS_MODULE;
+                }
+        }
+
+        return_VALUE(0);
+}
+
+
+static int
+acpi_button_remove_fs (
+        struct acpi_device      *device)
+{
+        struct acpi_button      *button = NULL;
+
+        ACPI_FUNCTION_TRACE("acpi_button_remove_fs");
+
+        button = acpi_driver_data(device);
+        if (acpi_device_dir(device)) {
+                if (button->type == ACPI_BUTTON_TYPE_LID)
+                        remove_proc_entry(ACPI_BUTTON_FILE_STATE,
+                                             acpi_device_dir(device));
+                remove_proc_entry(ACPI_BUTTON_FILE_INFO,
+                                     acpi_device_dir(device));
+
+                remove_proc_entry(acpi_device_bid(device),
+                                     acpi_device_dir(device)->parent);
+                acpi_device_dir(device) = NULL;
+        }
+
+        return_VALUE(0);
+}
+
+
 /* --------------------------------------------------------------------------
                                 Driver Interface
    -------------------------------------------------------------------------- */
@@ -121,7 +302,8 @@ acpi_button_notify_fixed (
         
         ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");
 
-        BUG_ON(!button);
+        if (!button)
+                return_ACPI_STATUS(AE_BAD_PARAMETER);
 
         acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
 
@@ -197,6 +379,10 @@ acpi_button_add (
                 goto end;
         }
 
+        result = acpi_button_add_fs(device);
+        if (result)
+                goto end;
+
         switch (button->type) {
         case ACPI_BUTTON_TYPE_POWERF:
                 status = acpi_install_fixed_event_handler (
@@ -240,6 +426,7 @@ acpi_button_add (
 
 end:
         if (result) {
+                acpi_button_remove_fs(device);
                 kfree(button);
         }
 
@@ -280,6 +467,8 @@ acpi_button_remove (struct acpi_device *device, int type)
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                         "Error removing notify handler\n"));
 
+        acpi_button_remove_fs(device);  
+
         kfree(button);
 
         return_VALUE(0);
@@ -293,14 +482,20 @@ acpi_button_init (void)
 
         ACPI_FUNCTION_TRACE("acpi_button_init");
 
+        acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
+        if (!acpi_button_dir)
+                return_VALUE(-ENODEV);
+        acpi_button_dir->owner = THIS_MODULE;
         result = acpi_bus_register_driver(&acpi_button_driver);
         if (result < 0) {
+                remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
                 return_VALUE(-ENODEV);
         }
 
         return_VALUE(0);
 }
 
+
 static void __exit
 acpi_button_exit (void)
 {
@@ -308,8 +503,17 @@ acpi_button_exit (void)
 
         acpi_bus_unregister_driver(&acpi_button_driver);
 
+        if (acpi_power_dir) 
+                remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
+        if (acpi_sleep_dir)
+                remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
+        if (acpi_lid_dir)
+                remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
+        remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
+
         return_VOID;
 }
 
+
 module_init(acpi_button_init);
 module_exit(acpi_button_exit);
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 2dadb7f63269..1ac5731d45e5 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -76,13 +76,14 @@ static int acpi_ec_remove (struct acpi_device *device, int type);
 static int acpi_ec_start (struct acpi_device *device);
 static int acpi_ec_stop (struct acpi_device *device, int type);
 static int acpi_ec_burst_add ( struct acpi_device *device);
+static int acpi_ec_polling_add ( struct acpi_device     *device);
 
 static struct acpi_driver acpi_ec_driver = {
         .name =         ACPI_EC_DRIVER_NAME,
         .class =        ACPI_EC_CLASS,
         .ids =          ACPI_EC_HID,
         .ops =          {
-                                .add =          acpi_ec_burst_add,
+                                .add =          acpi_ec_polling_add,
                                 .remove =       acpi_ec_remove,
                                 .start =        acpi_ec_start,
                                 .stop =         acpi_ec_stop,
@@ -164,7 +165,7 @@ static union acpi_ec	*ec_ecdt;
 
 /* External interfaces use first EC only, so remember */
 static struct acpi_device *first_ec;
-static int acpi_ec_polling_mode;
+static int acpi_ec_polling_mode = EC_POLLING;
 
 /* --------------------------------------------------------------------------
                              Transaction Management
@@ -1710,11 +1711,24 @@ static int __init acpi_fake_ecdt_setup(char *str)
         acpi_fake_ecdt_enabled = 1;
         return 0;
 }
+
 __setup("acpi_fake_ecdt", acpi_fake_ecdt_setup);
 static int __init acpi_ec_set_polling_mode(char *str)
 {
-        acpi_ec_polling_mode = EC_POLLING;
-        acpi_ec_driver.ops.add = acpi_ec_polling_add;
+        int burst;
+
+        if (!get_option(&str, &burst))
+                return 0;
+
+        if (burst) {
+                acpi_ec_polling_mode = EC_BURST;
+                acpi_ec_driver.ops.add = acpi_ec_burst_add;
+        } else {
+                acpi_ec_polling_mode = EC_POLLING;
+                acpi_ec_driver.ops.add = acpi_ec_polling_add;
+        }
+        printk(KERN_INFO PREFIX "EC %s mode.\n",
+                burst ? "burst": "polling");
         return 0;
 }
-__setup("ec_polling", acpi_ec_set_polling_mode);
+__setup("ec_burst=", acpi_ec_set_polling_mode);
diff --git a/drivers/acpi/hotkey.c b/drivers/acpi/hotkey.c
index babdf762eadb..1f76a40badec 100644
--- a/drivers/acpi/hotkey.c
+++ b/drivers/acpi/hotkey.c
@@ -1,5 +1,5 @@
-/* 
- *  hotkey.c - ACPI Hotkey Driver ($Revision:$)
+/*
+ *  hotkey.c - ACPI Hotkey Driver ($Revision: 0.2 $)
  *
  *  Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
  *
@@ -51,17 +51,18 @@
 #define ACPI_HOTKEY_POLLING 0x2
 #define ACPI_UNDEFINED_EVENT    0xf
 
-#define MAX_CONFIG_RECORD_LEN   80
-#define MAX_NAME_PATH_LEN   80
-#define MAX_CALL_PARM       80
+#define RESULT_STR_LEN      80
 
-#define IS_EVENT(e)       0xff  /* ((e) & 0x40000000)  */
-#define IS_POLL(e)      0xff    /* (~((e) & 0x40000000))  */
+#define ACTION_METHOD   0
+#define POLL_METHOD     1
 
+#define IS_EVENT(e)             ((e) <= 10000 && (e) >0)
+#define IS_POLL(e)              ((e) > 10000)
+#define IS_OTHERS(e)            ((e)<=0 || (e)>=20000)
 #define _COMPONENT              ACPI_HOTKEY_COMPONENT
 ACPI_MODULE_NAME("acpi_hotkey")
 
-    MODULE_AUTHOR("luming.yu@intel.com");
+MODULE_AUTHOR("luming.yu@intel.com");
 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
 MODULE_LICENSE("GPL");
 
@@ -114,7 +115,7 @@ struct acpi_event_hotkey {
         char *action_method;    /* action method */
 };
 
-/* 
+/*
  * There are two ways to poll status
  * 1. directy call read_xxx method, without any arguments passed in
  * 2. call write_xxx method, with arguments passed in, you need
@@ -131,7 +132,7 @@ struct acpi_polling_hotkey {
         char *poll_method;      /* poll method */
         acpi_handle action_handle;      /* acpi handle attached action method */
         char *action_method;    /* action method */
-        void *poll_result;      /* polling_result */
+        union acpi_object *poll_result; /* polling_result */
         struct proc_dir_entry *proc;
 };
 
@@ -162,20 +163,25 @@ static struct acpi_driver hotkey_driver = {
                 },
 };
 
+static void free_hotkey_device(union acpi_hotkey *key);
+static void free_hotkey_buffer(union acpi_hotkey *key);
+static void free_poll_hotkey_buffer(union acpi_hotkey *key);
 static int hotkey_open_config(struct inode *inode, struct file *file);
+static int hotkey_poll_open_config(struct inode *inode, struct file *file);
 static ssize_t hotkey_write_config(struct file *file,
                                    const char __user * buffer,
                                    size_t count, loff_t * data);
-static ssize_t hotkey_write_poll_config(struct file *file,
-                                        const char __user * buffer,
-                                        size_t count, loff_t * data);
 static int hotkey_info_open_fs(struct inode *inode, struct file *file);
 static int hotkey_action_open_fs(struct inode *inode, struct file *file);
 static ssize_t hotkey_execute_aml_method(struct file *file,
                                          const char __user * buffer,
                                          size_t count, loff_t * data);
 static int hotkey_config_seq_show(struct seq_file *seq, void *offset);
+static int hotkey_poll_config_seq_show(struct seq_file *seq, void *offset);
 static int hotkey_polling_open_fs(struct inode *inode, struct file *file);
+static union acpi_hotkey *get_hotkey_by_event(struct
+                              acpi_hotkey_list
+                              *hotkey_list, int event);
 
 /* event based config */
 static struct file_operations hotkey_config_fops = {
@@ -188,9 +194,9 @@ static struct file_operations hotkey_config_fops = {
 
 /* polling based config */
 static struct file_operations hotkey_poll_config_fops = {
-        .open = hotkey_open_config,
+        .open = hotkey_poll_open_config,
         .read = seq_read,
-        .write = hotkey_write_poll_config,
+        .write = hotkey_write_config,
         .llseek = seq_lseek,
         .release = single_release,
 };
@@ -227,7 +233,7 @@ static int hotkey_info_seq_show(struct seq_file *seq, void *offset)
 {
         ACPI_FUNCTION_TRACE("hotkey_info_seq_show");
 
-        seq_printf(seq, "Hotkey generic driver ver: %s", HOTKEY_ACPI_VERSION);
+        seq_printf(seq, "Hotkey generic driver ver: %s\n", HOTKEY_ACPI_VERSION);
 
         return_VALUE(0);
 }
@@ -239,27 +245,35 @@ static int hotkey_info_open_fs(struct inode *inode, struct file *file)
 
 static char *format_result(union acpi_object *object)
 {
-        char *buf = (char *)kmalloc(sizeof(union acpi_object), GFP_KERNEL);
-
-        memset(buf, 0, sizeof(union acpi_object));
+        char *buf = NULL;
+        
+        buf = (char *)kmalloc(RESULT_STR_LEN, GFP_KERNEL);
+        if (buf)
+                memset(buf, 0, RESULT_STR_LEN);
+        else
+                goto do_fail;
 
         /* Now, just support integer type */
         if (object->type == ACPI_TYPE_INTEGER)
-                sprintf(buf, "%d", (u32) object->integer.value);
-
-        return buf;
+                sprintf(buf, "%d\n", (u32) object->integer.value);
+do_fail:
+        return (buf);
 }
 
 static int hotkey_polling_seq_show(struct seq_file *seq, void *offset)
 {
         struct acpi_polling_hotkey *poll_hotkey =
             (struct acpi_polling_hotkey *)seq->private;
+        char *buf;
 
         ACPI_FUNCTION_TRACE("hotkey_polling_seq_show");
 
-        if (poll_hotkey->poll_result)
-                seq_printf(seq, "%s", format_result(poll_hotkey->poll_result));
-
+        if (poll_hotkey->poll_result){
+                buf = format_result(poll_hotkey->poll_result);
+                if(buf)
+                        seq_printf(seq, "%s", buf);
+                kfree(buf);
+        }
         return_VALUE(0);
 }
 
@@ -276,19 +290,19 @@ static int hotkey_action_open_fs(struct inode *inode, struct file *file)
 /* Mapping external hotkey number to standardized hotkey event num */
 static int hotkey_get_internal_event(int event, struct acpi_hotkey_list *list)
 {
-        struct list_head *entries, *next;
-        int val = 0;
+        struct list_head *entries;
+        int val = -1;
 
         ACPI_FUNCTION_TRACE("hotkey_get_internal_event");
 
-        list_for_each_safe(entries, next, list->entries) {
+        list_for_each(entries, list->entries) {
                 union acpi_hotkey *key =
                     container_of(entries, union acpi_hotkey, entries);
                 if (key->link.hotkey_type == ACPI_HOTKEY_EVENT
-                    && key->event_hotkey.external_hotkey_num == event)
+                    && key->event_hotkey.external_hotkey_num == event){
                         val = key->link.hotkey_standard_num;
-                else
-                        val = -1;
+                        break;
+                }
         }
 
         return_VALUE(val);
@@ -306,7 +320,7 @@ acpi_hotkey_notify_handler(acpi_handle handle, u32 event, void *data)
                 return_VOID;
 
         internal_event = hotkey_get_internal_event(event, &global_hotkey_list);
-        acpi_bus_generate_event(device, event, 0);
+        acpi_bus_generate_event(device, internal_event, 0);
 
         return_VOID;
 }
@@ -329,13 +343,17 @@ static int auto_hotkey_remove(struct acpi_device *device, int type)
 static int create_polling_proc(union acpi_hotkey *device)
 {
         struct proc_dir_entry *proc;
+        char  proc_name[80];
         mode_t mode;
 
         ACPI_FUNCTION_TRACE("create_polling_proc");
         mode = S_IFREG | S_IRUGO | S_IWUGO;
 
-        proc = create_proc_entry(device->poll_hotkey.action_method,
-                                 mode, hotkey_proc_dir);
+        sprintf(proc_name, "%d", device->link.hotkey_standard_num);
+        /*
+        strcat(proc_name, device->poll_hotkey.poll_method);
+        */
+        proc = create_proc_entry(proc_name, mode, hotkey_proc_dir);
 
         if (!proc) {
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
@@ -353,23 +371,6 @@ static int create_polling_proc(union acpi_hotkey *device)
         return_VALUE(0);
 }
 
-static int is_valid_acpi_path(const char *pathname)
-{
-        acpi_handle handle;
-        acpi_status status;
-        ACPI_FUNCTION_TRACE("is_valid_acpi_path");
-
-        status = acpi_get_handle(NULL, (char *)pathname, &handle);
-        return_VALUE(!ACPI_FAILURE(status));
-}
-
-static int is_valid_hotkey(union acpi_hotkey *device)
-{
-        ACPI_FUNCTION_TRACE("is_valid_hotkey");
-        /* Implement valid check */
-        return_VALUE(1);
-}
-
 static int hotkey_add(union acpi_hotkey *device)
 {
         int status = 0;
@@ -378,15 +379,11 @@ static int hotkey_add(union acpi_hotkey *device)
         ACPI_FUNCTION_TRACE("hotkey_add");
 
         if (device->link.hotkey_type == ACPI_HOTKEY_EVENT) {
-                status =
-                    acpi_bus_get_device(device->event_hotkey.bus_handle, &dev);
-                if (status)
-                        return_VALUE(status);
-
+                acpi_bus_get_device(device->event_hotkey.bus_handle, &dev);
                 status = acpi_install_notify_handler(dev->handle,
-                                                     ACPI_SYSTEM_NOTIFY,
+                                                     ACPI_DEVICE_NOTIFY,
                                                      acpi_hotkey_notify_handler,
-                                                     device);
+                                                     dev);
         } else                  /* Add polling hotkey */
                 create_polling_proc(device);
 
@@ -409,84 +406,143 @@ static int hotkey_remove(union acpi_hotkey *device)
                 if (key->link.hotkey_standard_num ==
                     device->link.hotkey_standard_num) {
                         list_del(&key->link.entries);
-                        remove_proc_entry(key->poll_hotkey.action_method,
-                                          hotkey_proc_dir);
+                        free_hotkey_device(key);
                         global_hotkey_list.count--;
                         break;
                 }
         }
+        kfree(device);
         return_VALUE(0);
 }
 
-static void hotkey_update(union acpi_hotkey *key)
+static int  hotkey_update(union acpi_hotkey *key)
 {
-        struct list_head *entries, *next;
+        struct list_head *entries;
 
         ACPI_FUNCTION_TRACE("hotkey_update");
 
-        list_for_each_safe(entries, next, global_hotkey_list.entries) {
-                union acpi_hotkey *key =
+        list_for_each(entries, global_hotkey_list.entries) {
+                union acpi_hotkey *tmp=
                     container_of(entries, union acpi_hotkey, entries);
-                if (key->link.hotkey_standard_num ==
+                if (tmp->link.hotkey_standard_num ==
                     key->link.hotkey_standard_num) {
-                        key->event_hotkey.bus_handle =
-                            key->event_hotkey.bus_handle;
-                        key->event_hotkey.external_hotkey_num =
-                            key->event_hotkey.external_hotkey_num;
-                        key->event_hotkey.action_handle =
-                            key->event_hotkey.action_handle;
-                        key->event_hotkey.action_method =
-                            key->event_hotkey.action_method;
+                        if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
+                                free_hotkey_buffer(tmp);
+                                tmp->event_hotkey.bus_handle =
+                                        key->event_hotkey.bus_handle;
+                                tmp->event_hotkey.external_hotkey_num =
+                                        key->event_hotkey.external_hotkey_num;
+                                tmp->event_hotkey.action_handle =
+                                        key->event_hotkey.action_handle;
+                                tmp->event_hotkey.action_method =
+                                        key->event_hotkey.action_method;
+                                kfree(key);
+                        } else {
+                                /*
+                                char  proc_name[80];
+
+                                sprintf(proc_name, "%d", tmp->link.hotkey_standard_num);
+                                strcat(proc_name, tmp->poll_hotkey.poll_method);
+                                remove_proc_entry(proc_name,hotkey_proc_dir);
+                                */
+                                free_poll_hotkey_buffer(tmp);
+                                tmp->poll_hotkey.poll_handle =
+                                        key->poll_hotkey.poll_handle;
+                                tmp->poll_hotkey.poll_method =
+                                        key->poll_hotkey.poll_method;
+                                tmp->poll_hotkey.action_handle =
+                                        key->poll_hotkey.action_handle;
+                                tmp->poll_hotkey.action_method =
+                                        key->poll_hotkey.action_method;
+                                tmp->poll_hotkey.poll_result =
+                                        key->poll_hotkey.poll_result;
+                                /*
+                                create_polling_proc(tmp);
+                                */
+                                kfree(key);
+                        }
+                        return_VALUE(0);
                         break;
                 }
         }
 
-        return_VOID;
+        return_VALUE(-ENODEV);
 }
 
 static void free_hotkey_device(union acpi_hotkey *key)
 {
         struct acpi_device *dev;
-        int status;
 
         ACPI_FUNCTION_TRACE("free_hotkey_device");
 
         if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
-                status =
-                    acpi_bus_get_device(key->event_hotkey.bus_handle, &dev);
+                acpi_bus_get_device(key->event_hotkey.bus_handle, &dev);
                 if (dev->handle)
                         acpi_remove_notify_handler(dev->handle,
-                                                   ACPI_SYSTEM_NOTIFY,
+                                                   ACPI_DEVICE_NOTIFY,
                                                    acpi_hotkey_notify_handler);
-        } else
-                remove_proc_entry(key->poll_hotkey.action_method,
-                                  hotkey_proc_dir);
+                free_hotkey_buffer(key);
+        } else {
+                char  proc_name[80];
+
+                sprintf(proc_name, "%d", key->link.hotkey_standard_num);
+                /*
+                strcat(proc_name, key->poll_hotkey.poll_method);
+                */
+                remove_proc_entry(proc_name,hotkey_proc_dir);
+                free_poll_hotkey_buffer(key);
+        }
         kfree(key);
         return_VOID;
 }
 
+static void
+free_hotkey_buffer(union acpi_hotkey *key)
+{
+        kfree(key->event_hotkey.action_method);
+}
+
+static void
+free_poll_hotkey_buffer(union acpi_hotkey *key)
+{
+        kfree(key->poll_hotkey.action_method);
+        kfree(key->poll_hotkey.poll_method);
+        kfree(key->poll_hotkey.poll_result);
+}
 static int
 init_hotkey_device(union acpi_hotkey *key, char *bus_str, char *action_str,
                    char *method, int std_num, int external_num)
 {
+        acpi_handle     tmp_handle;
+        acpi_status status = AE_OK;
+
         ACPI_FUNCTION_TRACE("init_hotkey_device");
 
+        if(std_num < 0 || IS_POLL(std_num) || !key )
+                goto do_fail;
+
+        if(!bus_str || !action_str || !method)
+                goto do_fail;
+
         key->link.hotkey_type = ACPI_HOTKEY_EVENT;
         key->link.hotkey_standard_num = std_num;
         key->event_hotkey.flag = 0;
-        if (is_valid_acpi_path(bus_str))
-                acpi_get_handle((acpi_handle) 0,
-                                bus_str, &(key->event_hotkey.bus_handle));
-        else
-                return_VALUE(-ENODEV);
-        key->event_hotkey.external_hotkey_num = external_num;
-        if (is_valid_acpi_path(action_str))
-                acpi_get_handle((acpi_handle) 0,
-                                action_str, &(key->event_hotkey.action_handle));
-        key->event_hotkey.action_method = kmalloc(sizeof(method), GFP_KERNEL);
-        strcpy(key->event_hotkey.action_method, method);
+        key->event_hotkey.action_method = method;
 
-        return_VALUE(!is_valid_hotkey(key));
+        status = acpi_get_handle(NULL,bus_str, &(key->event_hotkey.bus_handle));
+        if(ACPI_FAILURE(status))
+                goto do_fail;
+        key->event_hotkey.external_hotkey_num = external_num;
+        status = acpi_get_handle(NULL,action_str, &(key->event_hotkey.action_handle));
+        if(ACPI_FAILURE(status))
+                goto do_fail;
+        status = acpi_get_handle(key->event_hotkey.action_handle,
+                                method, &tmp_handle);
+        if (ACPI_FAILURE(status))
+                goto do_fail;
+        return_VALUE(AE_OK);
+do_fail:
+        return_VALUE(-ENODEV);
 }
 
 static int
@@ -495,34 +551,46 @@ init_poll_hotkey_device(union acpi_hotkey *key,
                         char *poll_method,
                         char *action_str, char *action_method, int std_num)
 {
+        acpi_status status = AE_OK;
+        acpi_handle     tmp_handle;
+
         ACPI_FUNCTION_TRACE("init_poll_hotkey_device");
 
+        if(std_num < 0 || IS_EVENT(std_num) || !key)
+                goto do_fail;
+
+        if(!poll_str || !poll_method || !action_str || !action_method)
+                goto do_fail;
+
         key->link.hotkey_type = ACPI_HOTKEY_POLLING;
         key->link.hotkey_standard_num = std_num;
         key->poll_hotkey.flag = 0;
-        if (is_valid_acpi_path(poll_str))
-                acpi_get_handle((acpi_handle) 0,
-                                poll_str, &(key->poll_hotkey.poll_handle));
-        else
-                return_VALUE(-ENODEV);
         key->poll_hotkey.poll_method = poll_method;
-        if (is_valid_acpi_path(action_str))
-                acpi_get_handle((acpi_handle) 0,
-                                action_str, &(key->poll_hotkey.action_handle));
-        key->poll_hotkey.action_method =
-            kmalloc(sizeof(action_method), GFP_KERNEL);
-        strcpy(key->poll_hotkey.action_method, action_method);
+        key->poll_hotkey.action_method = action_method;
+
+        status = acpi_get_handle(NULL,poll_str, &(key->poll_hotkey.poll_handle));
+        if(ACPI_FAILURE(status))
+                goto do_fail;
+        status = acpi_get_handle(key->poll_hotkey.poll_handle,
+                                poll_method, &tmp_handle);
+        if (ACPI_FAILURE(status))
+                goto do_fail;
+        status = acpi_get_handle(NULL,action_str, &(key->poll_hotkey.action_handle));
+        if (ACPI_FAILURE(status))
+                goto do_fail;
+        status = acpi_get_handle(key->poll_hotkey.action_handle,
+                                action_method, &tmp_handle);
+        if (ACPI_FAILURE(status))
+                goto do_fail;
         key->poll_hotkey.poll_result =
             (union acpi_object *)kmalloc(sizeof(union acpi_object), GFP_KERNEL);
-        return_VALUE(is_valid_hotkey(key));
+        if(!key->poll_hotkey.poll_result)
+                goto do_fail;
+        return_VALUE(AE_OK);
+do_fail:
+        return_VALUE(-ENODEV);
 }
 
-static int check_hotkey_valid(union acpi_hotkey *key,
-                              struct acpi_hotkey_list *list)
-{
-        ACPI_FUNCTION_TRACE("check_hotkey_valid");
-        return_VALUE(0);
-}
 
 static int hotkey_open_config(struct inode *inode, struct file *file)
 {
@@ -531,10 +599,17 @@ static int hotkey_open_config(struct inode *inode, struct file *file)
                      (file, hotkey_config_seq_show, PDE(inode)->data));
 }
 
+static int hotkey_poll_open_config(struct inode *inode, struct file *file)
+{
+        ACPI_FUNCTION_TRACE("hotkey_poll_open_config");
+        return_VALUE(single_open
+                     (file, hotkey_poll_config_seq_show, PDE(inode)->data));
+}
+
 static int hotkey_config_seq_show(struct seq_file *seq, void *offset)
 {
         struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
-        struct list_head *entries, *next;
+        struct list_head *entries;
         char bus_name[ACPI_PATHNAME_MAX] = { 0 };
         char action_name[ACPI_PATHNAME_MAX] = { 0 };
         struct acpi_buffer bus = { ACPI_PATHNAME_MAX, bus_name };
@@ -542,10 +617,7 @@ static int hotkey_config_seq_show(struct seq_file *seq, void *offset)
 
         ACPI_FUNCTION_TRACE(("hotkey_config_seq_show"));
 
-        if (!hotkey_list)
-                goto end;
-
-        list_for_each_safe(entries, next, hotkey_list->entries) {
+        list_for_each(entries, hotkey_list->entries) {
                 union acpi_hotkey *key =
                     container_of(entries, union acpi_hotkey, entries);
                 if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
@@ -553,18 +625,37 @@ static int hotkey_config_seq_show(struct seq_file *seq, void *offset)
                                       ACPI_NAME_TYPE_MAX, &bus);
                         acpi_get_name(key->event_hotkey.action_handle,
                                       ACPI_NAME_TYPE_MAX, &act);
-                        seq_printf(seq, "%s:%s:%s:%d:%d", bus_name,
+                        seq_printf(seq, "%s:%s:%s:%d:%d\n", bus_name,
                                    action_name,
                                    key->event_hotkey.action_method,
                                    key->link.hotkey_standard_num,
                                    key->event_hotkey.external_hotkey_num);
-                } /* ACPI_HOTKEY_POLLING */
-                else {
+                }
+        }
+        seq_puts(seq, "\n");
+        return_VALUE(0);
+}
+
+static int hotkey_poll_config_seq_show(struct seq_file *seq, void *offset)
+{
+        struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
+        struct list_head *entries;
+        char bus_name[ACPI_PATHNAME_MAX] = { 0 };
+        char action_name[ACPI_PATHNAME_MAX] = { 0 };
+        struct acpi_buffer bus = { ACPI_PATHNAME_MAX, bus_name };
+        struct acpi_buffer act = { ACPI_PATHNAME_MAX, action_name };
+
+        ACPI_FUNCTION_TRACE(("hotkey_config_seq_show"));
+
+        list_for_each(entries, hotkey_list->entries) {
+                union acpi_hotkey *key =
+                    container_of(entries, union acpi_hotkey, entries);
+                if (key->link.hotkey_type == ACPI_HOTKEY_POLLING) {
                         acpi_get_name(key->poll_hotkey.poll_handle,
                                       ACPI_NAME_TYPE_MAX, &bus);
                         acpi_get_name(key->poll_hotkey.action_handle,
                                       ACPI_NAME_TYPE_MAX, &act);
-                        seq_printf(seq, "%s:%s:%s:%s:%d", bus_name,
+                        seq_printf(seq, "%s:%s:%s:%s:%d\n", bus_name,
                                    key->poll_hotkey.poll_method,
                                    action_name,
                                    key->poll_hotkey.action_method,
@@ -572,49 +663,83 @@ static int hotkey_config_seq_show(struct seq_file *seq, void *offset)
                 }
         }
         seq_puts(seq, "\n");
-      end:
         return_VALUE(0);
 }
 
 static int
 get_parms(char *config_record,
           int *cmd,
-          char *bus_handle,
-          char *bus_method,
-          char *action_handle,
-          char *method, int *internal_event_num, int *external_event_num)
+          char **bus_handle,
+          char **bus_method,
+          char **action_handle,
+          char **method, int *internal_event_num, int *external_event_num)
 {
-        char *tmp, *tmp1;
+        char *tmp, *tmp1, count;
         ACPI_FUNCTION_TRACE(("get_parms"));
 
         sscanf(config_record, "%d", cmd);
 
+        if(*cmd == 1){
+                if(sscanf(config_record, "%d:%d", cmd, internal_event_num)!=2)
+                        goto do_fail;
+                else
+                        return (6);
+        }
         tmp = strchr(config_record, ':');
+        if (!tmp)
+                goto do_fail;
         tmp++;
         tmp1 = strchr(tmp, ':');
-        strncpy(bus_handle, tmp, tmp1 - tmp);
-        bus_handle[tmp1 - tmp] = 0;
+        if (!tmp1)
+                goto do_fail;
+
+        count = tmp1 - tmp;
+        *bus_handle = (char *) kmalloc(count+1, GFP_KERNEL);
+        if(!*bus_handle)
+                goto do_fail;
+        strncpy(*bus_handle, tmp, count);
+        *(*bus_handle + count) = 0;
 
         tmp = tmp1;
         tmp++;
         tmp1 = strchr(tmp, ':');
-        strncpy(bus_method, tmp, tmp1 - tmp);
-        bus_method[tmp1 - tmp] = 0;
+        if (!tmp1)
+                goto do_fail;
+        count = tmp1 - tmp;
+        *bus_method = (char *) kmalloc(count+1, GFP_KERNEL);
+        if(!*bus_method)
+                goto do_fail;
+        strncpy(*bus_method, tmp, count);
+        *(*bus_method + count) = 0;
 
         tmp = tmp1;
         tmp++;
         tmp1 = strchr(tmp, ':');
-        strncpy(action_handle, tmp, tmp1 - tmp);
-        action_handle[tmp1 - tmp] = 0;
+        if (!tmp1)
+                goto do_fail;
+        count = tmp1 - tmp;
+        *action_handle = (char *) kmalloc(count+1, GFP_KERNEL);
+        strncpy(*action_handle, tmp, count);
+        *(*action_handle + count) = 0;
 
         tmp = tmp1;
         tmp++;
         tmp1 = strchr(tmp, ':');
-        strncpy(method, tmp, tmp1 - tmp);
-        method[tmp1 - tmp] = 0;
+        if (!tmp1)
+                goto do_fail;
+        count = tmp1 - tmp;
+        *method = (char *) kmalloc(count+1, GFP_KERNEL);
+        if(!*method)
+                goto do_fail;
+        strncpy(*method, tmp, count);
+        *(*method + count) = 0;
+
+        if(sscanf(tmp1 + 1, "%d:%d", internal_event_num, external_event_num)<=0)
+                goto do_fail;
 
-        sscanf(tmp1 + 1, "%d:%d", internal_event_num, external_event_num);
         return_VALUE(6);
+do_fail:
+        return_VALUE(-1);
 }
 
 /*  count is length for one input record */
@@ -622,135 +747,117 @@ static ssize_t hotkey_write_config(struct file *file,
                                    const char __user * buffer,
                                    size_t count, loff_t * data)
 {
-        struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
-        char config_record[MAX_CONFIG_RECORD_LEN];
-        char bus_handle[MAX_NAME_PATH_LEN];
-        char bus_method[MAX_NAME_PATH_LEN];
-        char action_handle[MAX_NAME_PATH_LEN];
-        char method[20];
+        char *config_record = NULL;
+        char *bus_handle = NULL;
+        char *bus_method = NULL;
+        char *action_handle = NULL;
+        char *method = NULL;
         int cmd, internal_event_num, external_event_num;
         int ret = 0;
         union acpi_hotkey *key = NULL;
 
         ACPI_FUNCTION_TRACE(("hotkey_write_config"));
 
-        if (!hotkey_list || count > MAX_CONFIG_RECORD_LEN) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid arguments\n"));
-                return_VALUE(-EINVAL);
-        }
+        config_record = (char *) kmalloc(count+1, GFP_KERNEL);
+        if(!config_record)
+                return_VALUE(-ENOMEM);
 
         if (copy_from_user(config_record, buffer, count)) {
+                kfree(config_record);
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data \n"));
                 return_VALUE(-EINVAL);
         }
-        config_record[count] = '\0';
+        config_record[count] = 0;
 
         ret = get_parms(config_record,
                         &cmd,
-                        bus_handle,
-                        bus_method,
-                        action_handle,
-                        method, &internal_event_num, &external_event_num);
+                        &bus_handle,
+                        &bus_method,
+                        &action_handle,
+                        &method, &internal_event_num, &external_event_num);
+
+        kfree(config_record);
+        if(IS_OTHERS(internal_event_num))
+                goto do_fail;
         if (ret != 6) {
+do_fail:        
+                kfree(bus_handle);
+                kfree(bus_method);
+                kfree(action_handle);
+                kfree(method);
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                   "Invalid data format ret=%d\n", ret));
                 return_VALUE(-EINVAL);
         }
 
         key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL);
-        ret = init_hotkey_device(key, bus_handle, action_handle, method,
+        if(!key)
+                goto do_fail;
+        memset(key, 0, sizeof(union acpi_hotkey));
+        if(cmd == 1) {
+                union acpi_hotkey *tmp = NULL;
+                tmp = get_hotkey_by_event(&global_hotkey_list,
+                                internal_event_num);
+                if(!tmp)
+                        ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid key"));
+                else
+                        memcpy(key, tmp, sizeof(union acpi_hotkey));
+                goto cont_cmd;
+        }
+        if (IS_EVENT(internal_event_num)) {
+                kfree(bus_method);
+                ret = init_hotkey_device(key, bus_handle, action_handle, method,
                                  internal_event_num, external_event_num);
-
-        if (ret || check_hotkey_valid(key, hotkey_list)) {
+        } else
+                ret = init_poll_hotkey_device(key, bus_handle, bus_method,
+                                      action_handle, method,
+                                      internal_event_num);
+        if (ret) {
+                kfree(bus_handle);
+                kfree(action_handle);
+                if(IS_EVENT(internal_event_num))
+                        free_hotkey_buffer(key);
+                else
+                        free_poll_hotkey_buffer(key);
                 kfree(key);
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid hotkey \n"));
                 return_VALUE(-EINVAL);
         }
-        switch (cmd) {
-        case 0:
-                hotkey_add(key);
-                break;
-        case 1:
-                hotkey_remove(key);
-                free_hotkey_device(key);
-                break;
-        case 2:
-                hotkey_update(key);
-                break;
-        default:
-                break;
-        }
-        return_VALUE(count);
-}
-
-/*  count is length for one input record */
-static ssize_t hotkey_write_poll_config(struct file *file,
-                                        const char __user * buffer,
-                                        size_t count, loff_t * data)
-{
-        struct seq_file *m = (struct seq_file *)file->private_data;
-        struct acpi_hotkey_list *hotkey_list =
-            (struct acpi_hotkey_list *)m->private;
-
-        char config_record[MAX_CONFIG_RECORD_LEN];
-        char polling_handle[MAX_NAME_PATH_LEN];
-        char action_handle[MAX_NAME_PATH_LEN];
-        char poll_method[20], action_method[20];
-        int ret, internal_event_num, cmd, external_event_num;
-        union acpi_hotkey *key = NULL;
-
-        ACPI_FUNCTION_TRACE("hotkey_write_poll_config");
-
-        if (!hotkey_list || count > MAX_CONFIG_RECORD_LEN) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid arguments\n"));
-                return_VALUE(-EINVAL);
-        }
-
-        if (copy_from_user(config_record, buffer, count)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data \n"));
-                return_VALUE(-EINVAL);
-        }
-        config_record[count] = '\0';
 
-        ret = get_parms(config_record,
-                        &cmd,
-                        polling_handle,
-                        poll_method,
-                        action_handle,
-                        action_method,
-                        &internal_event_num, &external_event_num);
-
-        if (ret != 6) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n"));
-                return_VALUE(-EINVAL);
-        }
+cont_cmd:
+        kfree(bus_handle);
+        kfree(action_handle);
 
-        key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL);
-        ret = init_poll_hotkey_device(key, polling_handle, poll_method,
-                                      action_handle, action_method,
-                                      internal_event_num);
-        if (ret || check_hotkey_valid(key, hotkey_list)) {
-                kfree(key);
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid hotkey \n"));
-                return_VALUE(-EINVAL);
-        }
         switch (cmd) {
         case 0:
-                hotkey_add(key);
+                if(get_hotkey_by_event(&global_hotkey_list,key->link.hotkey_standard_num))
+                        goto fail_out;
+                else
+                        hotkey_add(key);
                 break;
         case 1:
                 hotkey_remove(key);
                 break;
         case 2:
-                hotkey_update(key);
+                if(hotkey_update(key))
+                        goto fail_out;
                 break;
         default:
+                goto fail_out;
                 break;
         }
         return_VALUE(count);
+fail_out:
+        if(IS_EVENT(internal_event_num))
+                free_hotkey_buffer(key);
+        else
+                free_poll_hotkey_buffer(key);
+        kfree(key);
+        ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "invalid key\n"));
+        return_VALUE(-EINVAL);
 }
 
-/*  
+/*
  * This function evaluates an ACPI method, given an int as parameter, the
  * method is searched within the scope of the handle, can be NULL. The output
  * of the method is written is output, which can also be NULL
@@ -775,7 +882,7 @@ static int write_acpi_int(acpi_handle handle, const char *method, int val,
         return_VALUE(status == AE_OK);
 }
 
-static int read_acpi_int(acpi_handle handle, const char *method, int *val)
+static int read_acpi_int(acpi_handle handle, const char *method, union acpi_object *val)
 {
         struct acpi_buffer output;
         union acpi_object out_obj;
@@ -786,62 +893,32 @@ static int read_acpi_int(acpi_handle handle, const char *method, int *val)
         output.pointer = &out_obj;
 
         status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
-        *val = out_obj.integer.value;
+        if(val){
+                val->integer.value = out_obj.integer.value;
+                val->type = out_obj.type;
+        } else
+                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "null val pointer"));
         return_VALUE((status == AE_OK)
                      && (out_obj.type == ACPI_TYPE_INTEGER));
 }
 
-static acpi_handle
-get_handle_from_hotkeylist(struct acpi_hotkey_list *hotkey_list, int event_num)
+static union acpi_hotkey *get_hotkey_by_event(struct
+                              acpi_hotkey_list
+                              *hotkey_list, int event)
 {
-        struct list_head *entries, *next;
-
-        list_for_each_safe(entries, next, hotkey_list->entries) {
-                union acpi_hotkey *key =
-                    container_of(entries, union acpi_hotkey, entries);
-                if (key->link.hotkey_type == ACPI_HOTKEY_EVENT
-                    && key->link.hotkey_standard_num == event_num) {
-                        return (key->event_hotkey.action_handle);
-                }
-        }
-        return (NULL);
-}
-
-static
-char *get_method_from_hotkeylist(struct acpi_hotkey_list *hotkey_list,
-                                 int event_num)
-{
-        struct list_head *entries, *next;
-
-        list_for_each_safe(entries, next, hotkey_list->entries) {
-                union acpi_hotkey *key =
-                    container_of(entries, union acpi_hotkey, entries);
-
-                if (key->link.hotkey_type == ACPI_HOTKEY_EVENT &&
-                    key->link.hotkey_standard_num == event_num)
-                        return (key->event_hotkey.action_method);
-        }
-        return (NULL);
-}
-
-static struct acpi_polling_hotkey *get_hotkey_by_event(struct
-                                                       acpi_hotkey_list
-                                                       *hotkey_list, int event)
-{
-        struct list_head *entries, *next;
+        struct list_head *entries;
 
-        list_for_each_safe(entries, next, hotkey_list->entries) {
+        list_for_each(entries, hotkey_list->entries) {
                 union acpi_hotkey *key =
                     container_of(entries, union acpi_hotkey, entries);
-                if (key->link.hotkey_type == ACPI_HOTKEY_POLLING
-                    && key->link.hotkey_standard_num == event) {
-                        return (&key->poll_hotkey);
+                if (key->link.hotkey_standard_num == event) {
+                        return(key);
                 }
         }
-        return (NULL);
+        return(NULL);
 }
 
-/*  
+/*
  * user call AML method interface:
  * Call convention:
  * echo "event_num: arg type : value"
@@ -854,48 +931,56 @@ static ssize_t hotkey_execute_aml_method(struct file *file,
                                          size_t count, loff_t * data)
 {
         struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
-        char arg[MAX_CALL_PARM];
-        int event, type, value;
-
-        char *method;
-        acpi_handle handle;
+        char *arg;
+        int event,method_type,type, value;
+        union acpi_hotkey *key;
 
         ACPI_FUNCTION_TRACE("hotkey_execte_aml_method");
 
-        if (!hotkey_list || count > MAX_CALL_PARM) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 1"));
-                return_VALUE(-EINVAL);
-        }
+        arg = (char *) kmalloc(count+1, GFP_KERNEL);
+        if(!arg)
+                return_VALUE(-ENOMEM);
+        arg[count]=0;
 
         if (copy_from_user(arg, buffer, count)) {
+                kfree(arg);
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 2"));
                 return_VALUE(-EINVAL);
         }
 
-        arg[count] = '\0';
-
-        if (sscanf(arg, "%d:%d:%d", &event, &type, &value) != 3) {
+        if (sscanf(arg, "%d:%d:%d:%d", &event, &method_type, &type, &value) != 4) {
+                kfree(arg);
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 3"));
                 return_VALUE(-EINVAL);
         }
-
+        kfree(arg);
         if (type == ACPI_TYPE_INTEGER) {
-                handle = get_handle_from_hotkeylist(hotkey_list, event);
-                method = (char *)get_method_from_hotkeylist(hotkey_list, event);
+                key = get_hotkey_by_event(hotkey_list, event);
+                if(!key)
+                        goto do_fail;
                 if (IS_EVENT(event))
-                        write_acpi_int(handle, method, value, NULL);
+                        write_acpi_int(key->event_hotkey.action_handle,
+                                        key->event_hotkey.action_method, value, NULL);
                 else if (IS_POLL(event)) {
-                        struct acpi_polling_hotkey *key;
-                        key = (struct acpi_polling_hotkey *)
-                            get_hotkey_by_event(hotkey_list, event);
-                        read_acpi_int(handle, method, key->poll_result);
+                        if ( method_type == POLL_METHOD )
+                                read_acpi_int(key->poll_hotkey.poll_handle,
+                                        key->poll_hotkey.poll_method,
+                                        key->poll_hotkey.poll_result);
+                        else if ( method_type == ACTION_METHOD )
+                                write_acpi_int(key->poll_hotkey.action_handle,
+                                        key->poll_hotkey.action_method, value, NULL);
+                        else
+                                goto do_fail;
+
                 }
         } else {
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Not supported"));
                 return_VALUE(-EINVAL);
         }
-
         return_VALUE(count);
+do_fail:
+        return_VALUE(-EINVAL);
+
 }
 
 static int __init hotkey_init(void)
@@ -928,7 +1013,7 @@ static int __init hotkey_init(void)
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                   "Hotkey: Unable to create %s entry\n",
                                   HOTKEY_EV_CONFIG));
-                return (-ENODEV);
+                goto do_fail1;
         } else {
                 hotkey_config->proc_fops = &hotkey_config_fops;
                 hotkey_config->data = &global_hotkey_list;
@@ -943,7 +1028,8 @@ static int __init hotkey_init(void)
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                   "Hotkey: Unable to create %s entry\n",
                                   HOTKEY_EV_CONFIG));
-                return (-ENODEV);
+
+                goto do_fail2;
         } else {
                 hotkey_poll_config->proc_fops = &hotkey_poll_config_fops;
                 hotkey_poll_config->data = &global_hotkey_list;
@@ -957,7 +1043,7 @@ static int __init hotkey_init(void)
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                   "Hotkey: Unable to create %s entry\n",
                                   HOTKEY_ACTION));
-                return (-ENODEV);
+                goto do_fail3;
         } else {
                 hotkey_action->proc_fops = &hotkey_action_fops;
                 hotkey_action->owner = THIS_MODULE;
@@ -970,7 +1056,7 @@ static int __init hotkey_init(void)
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
                                   "Hotkey: Unable to create %s entry\n",
                                   HOTKEY_INFO));
-                return (-ENODEV);
+                goto do_fail4;
         } else {
                 hotkey_info->proc_fops = &hotkey_info_fops;
                 hotkey_info->owner = THIS_MODULE;
@@ -979,23 +1065,33 @@ static int __init hotkey_init(void)
         }
 
         result = acpi_bus_register_driver(&hotkey_driver);
-        if (result < 0) {
-                remove_proc_entry(HOTKEY_PROC, acpi_root_dir);
-                return (-ENODEV);
-        }
+        if (result < 0)
+                goto do_fail5;
         global_hotkey_list.count = 0;
         global_hotkey_list.entries = &hotkey_entries;
 
         INIT_LIST_HEAD(&hotkey_entries);
 
         return (0);
+
+do_fail5:
+        remove_proc_entry(HOTKEY_INFO, hotkey_proc_dir);
+do_fail4:
+        remove_proc_entry(HOTKEY_ACTION, hotkey_proc_dir);
+do_fail3:
+        remove_proc_entry(HOTKEY_PL_CONFIG, hotkey_proc_dir);
+do_fail2:
+        remove_proc_entry(HOTKEY_EV_CONFIG, hotkey_proc_dir);
+do_fail1:
+        remove_proc_entry(HOTKEY_PROC, acpi_root_dir);
+        return (-ENODEV);
 }
 
 static void __exit hotkey_exit(void)
 {
         struct list_head *entries, *next;
 
-        ACPI_FUNCTION_TRACE("hotkey_remove");
+        ACPI_FUNCTION_TRACE("hotkey_exit");
 
         list_for_each_safe(entries, next, global_hotkey_list.entries) {
                 union acpi_hotkey *key =
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index d9a9b86ecb28..65cea07abbc3 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -692,7 +692,18 @@ acpi_pci_link_free_irq(acpi_handle handle)
                 return_VALUE(-1);
         }
 
+#ifdef  FUTURE_USE
+        /*
+         * The Link reference count allows us to _DISable an unused link
+         * and suspend time, and set it again  on resume.
+         * However, 2.6.12 still has irq_router.resume
+         * which blindly restores the link state.
+         * So we disable the reference count method
+         * to prevent duplicate acpi_pci_link_set()
+         * which would harm some systems
+         */
         link->refcnt --;
+#endif
         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                 "Link %s is dereferenced\n", acpi_device_bid(link->device)));
 
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index af271d994f15..2c04740c6543 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -86,12 +86,11 @@ static int set_max_cstate(struct dmi_system_id *id)
         if (max_cstate > ACPI_PROCESSOR_MAX_POWER)
                 return 0;
 
-        printk(KERN_NOTICE PREFIX "%s detected - %s disabled."
+        printk(KERN_NOTICE PREFIX "%s detected - limiting to C%ld max_cstate."
                 " Override with \"processor.max_cstate=%d\"\n", id->ident,
-                ((int)id->driver_data == 1)? "C2,C3":"C3",
-               ACPI_PROCESSOR_MAX_POWER + 1);
+                (long)id->driver_data, ACPI_PROCESSOR_MAX_POWER + 1);
 
-        max_cstate = (int)id->driver_data;
+        max_cstate = (long)id->driver_data;
 
         return 0;
 }