From d568df84f987a9321c1f5826a6c8678ef2bb2b70 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@xenotime.net>
Date: Wed, 12 Jul 2006 01:47:00 -0400
Subject: ACPI: handle firmware_register init errors

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/bus.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index b2977695e12..7b77ee146a8 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
+#include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/sched.h>
 #include <linux/pm.h>
@@ -738,7 +739,10 @@ static int __init acpi_init(void)
 		return -ENODEV;
 	}
 
-	firmware_register(&acpi_subsys);
+	result = firmware_register(&acpi_subsys);
+	if (result < 0)
+		printk(KERN_WARNING "%s: firmware_register error: %d\n",
+			__FUNCTION__, result);
 
 	result = acpi_bus_init();
 
-- 
cgit v1.2.3-18-g5258


From 9b6d97b64eff08b368375efcf9c1d01eba582ea2 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@xenotime.net>
Date: Wed, 12 Jul 2006 02:08:00 -0400
Subject: ACPI: scan: handle kset/kobject errors

Check and handle kset_register() and kobject_register() init errors.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/scan.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5fcb50c7b77..698a1540e30 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -4,6 +4,7 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/kernel.h>
 #include <linux/acpi.h>
 
 #include <acpi/acpi_drivers.h>
@@ -113,6 +114,8 @@ static struct kset acpi_namespace_kset = {
 static void acpi_device_register(struct acpi_device *device,
 				 struct acpi_device *parent)
 {
+	int err;
+
 	/*
 	 * Linkage
 	 * -------
@@ -138,7 +141,10 @@ static void acpi_device_register(struct acpi_device *device,
 		device->kobj.parent = &parent->kobj;
 	device->kobj.ktype = &ktype_acpi_ns;
 	device->kobj.kset = &acpi_namespace_kset;
-	kobject_register(&device->kobj);
+	err = kobject_register(&device->kobj);
+	if (err < 0)
+		printk(KERN_WARNING "%s: kobject_register error: %d\n",
+			__FUNCTION__, err);
 	create_sysfs_device_files(device);
 }
 
@@ -1450,7 +1456,9 @@ static int __init acpi_scan_init(void)
 	if (acpi_disabled)
 		return 0;
 
-	kset_register(&acpi_namespace_kset);
+	result = kset_register(&acpi_namespace_kset);
+	if (result < 0)
+		printk(KERN_ERR PREFIX "kset_register error: %d\n", result);
 
 	result = bus_register(&acpi_bus_type);
 	if (result) {
-- 
cgit v1.2.3-18-g5258


From 9805cb76f7bcd3108e012270d9ef2fd8ea3bea55 Mon Sep 17 00:00:00 2001
From: Len Brown <len.brown@intel.com>
Date: Tue, 25 Jul 2006 13:30:57 -0400
Subject: ACPI: restore some dmesg to DEBUG-only, ala 2.6.17

The ACPI_EXCEPTION() patch enabled a bunch of messages to print
even in the non-DEBUG kernel.  Need to change a couple back,
and note that ACPI_EXCEPTION takes no \n, but ACPI_DEBUG_PRINT does.

No context for object [%p]\n
Device `[%s]' is not power manageable\n

Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/bus.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 7b77ee146a8..279c4bac92e 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -69,7 +69,8 @@ int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
 
 	status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
 	if (ACPI_FAILURE(status) || !*device) {
-		ACPI_EXCEPTION((AE_INFO, status, "No context for object [%p]", handle));
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
+				  handle));
 		return -ENODEV;
 	}
 
@@ -193,7 +194,7 @@ int acpi_bus_set_power(acpi_handle handle, int state)
 	/* Make sure this is a valid target state */
 
 	if (!device->flags.power_manageable) {
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable",
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n",
 				device->kobj.name));
 		return -ENODEV;
 	}
-- 
cgit v1.2.3-18-g5258


From 0ee6a17389ceef65f1a86c38872fa98f08489022 Mon Sep 17 00:00:00 2001
From: Jean Delvare <khali@linux-fr.org>
Date: Fri, 11 Aug 2006 08:30:31 +0200
Subject: ACPI: fix kfree in i2c_ec error path

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/i2c_ec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/i2c_ec.c b/drivers/acpi/i2c_ec.c
index 84239d51dc0..6809c283ec5 100644
--- a/drivers/acpi/i2c_ec.c
+++ b/drivers/acpi/i2c_ec.c
@@ -330,7 +330,7 @@ static int acpi_ec_hc_add(struct acpi_device *device)
 	status = acpi_evaluate_integer(ec_hc->handle, "_EC", NULL, &val);
 	if (ACPI_FAILURE(status)) {
 		ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Error obtaining _EC\n"));
-		kfree(ec_hc->smbus);
+		kfree(ec_hc);
 		kfree(smbus);
 		return -EIO;
 	}
-- 
cgit v1.2.3-18-g5258


From 4d8316d5ea4dcf0bf15d8a06d539ed7c99e9cfbe Mon Sep 17 00:00:00 2001
From: Pavel Machek <pavel@ucw.cz>
Date: Mon, 14 Aug 2006 22:37:22 -0700
Subject: ACPI: fix boot with acpi=off

Fix acpi_ac/battery boot with acpi=off

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/ac.c      | 2 ++
 drivers/acpi/battery.c | 3 +++
 2 files changed, 5 insertions(+)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 96309b9660d..11abc7bf777 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -285,6 +285,8 @@ static int __init acpi_ac_init(void)
 {
 	int result;
 
+	if (acpi_disabled)
+		return -ENODEV;
 
 	acpi_ac_dir = acpi_lock_ac_dir();
 	if (!acpi_ac_dir)
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 6e5221707d9..9810e2a55d0 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -757,6 +757,9 @@ static int __init acpi_battery_init(void)
 {
 	int result;
 
+	if (acpi_disabled)
+		return -ENODEV;
+
 	acpi_battery_dir = acpi_lock_battery_dir();
 	if (!acpi_battery_dir)
 		return -ENODEV;
-- 
cgit v1.2.3-18-g5258


From b20d2aeb0ad322cbe7fd9120acae6118231b17a3 Mon Sep 17 00:00:00 2001
From: Len Brown <len.brown@intel.com>
Date: Tue, 15 Aug 2006 23:21:37 -0400
Subject: ACPI: skip smart battery init when acpi=off

Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/sbs.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index db7b350a503..62bef0b3b61 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -1714,6 +1714,9 @@ static int __init acpi_sbs_init(void)
 {
 	int result = 0;
 
+	if (acpi_disabled)
+		return -ENODEV;
+
 	init_MUTEX(&sbs_sem);
 
 	if (capacity_mode != DEF_CAPACITY_UNIT
-- 
cgit v1.2.3-18-g5258


From 7daef60721e03809c7e5f8aa8491df4190f6b56f Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@xenotime.net>
Date: Mon, 14 Aug 2006 22:37:24 -0700
Subject: ACPI: add message if firmware_register() init fails

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/bus.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index b2977695e12..7b77ee146a8 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
+#include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/sched.h>
 #include <linux/pm.h>
@@ -738,7 +739,10 @@ static int __init acpi_init(void)
 		return -ENODEV;
 	}
 
-	firmware_register(&acpi_subsys);
+	result = firmware_register(&acpi_subsys);
+	if (result < 0)
+		printk(KERN_WARNING "%s: firmware_register error: %d\n",
+			__FUNCTION__, result);
 
 	result = acpi_bus_init();
 
-- 
cgit v1.2.3-18-g5258


From e9a315bcae3b9e0c54fb68ef90d0095956314480 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@xenotime.net>
Date: Mon, 14 Aug 2006 22:37:24 -0700
Subject: ACPI: verbose on kset/kobject_register errors

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/scan.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5fcb50c7b77..698a1540e30 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -4,6 +4,7 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/kernel.h>
 #include <linux/acpi.h>
 
 #include <acpi/acpi_drivers.h>
@@ -113,6 +114,8 @@ static struct kset acpi_namespace_kset = {
 static void acpi_device_register(struct acpi_device *device,
 				 struct acpi_device *parent)
 {
+	int err;
+
 	/*
 	 * Linkage
 	 * -------
@@ -138,7 +141,10 @@ static void acpi_device_register(struct acpi_device *device,
 		device->kobj.parent = &parent->kobj;
 	device->kobj.ktype = &ktype_acpi_ns;
 	device->kobj.kset = &acpi_namespace_kset;
-	kobject_register(&device->kobj);
+	err = kobject_register(&device->kobj);
+	if (err < 0)
+		printk(KERN_WARNING "%s: kobject_register error: %d\n",
+			__FUNCTION__, err);
 	create_sysfs_device_files(device);
 }
 
@@ -1450,7 +1456,9 @@ static int __init acpi_scan_init(void)
 	if (acpi_disabled)
 		return 0;
 
-	kset_register(&acpi_namespace_kset);
+	result = kset_register(&acpi_namespace_kset);
+	if (result < 0)
+		printk(KERN_ERR PREFIX "kset_register error: %d\n", result);
 
 	result = bus_register(&acpi_bus_type);
 	if (result) {
-- 
cgit v1.2.3-18-g5258


From 07dd4855e7fffeb50565826e5e736509ee8f6129 Mon Sep 17 00:00:00 2001
From: Yasunori Goto <y-goto@jp.fujitsu.com>
Date: Mon, 14 Aug 2006 22:37:32 -0700
Subject: ACPI: memory hotplug: remove useless message at boot time

This is to remove noisy useless message at boot.  The message is a ton of
"ACPI Exception (acpi_memory-0492): AE_ERROR, handle is no memory device"

In my emulation, number of memory devices are not so many (only 6), but,
this messages are displayed 114 times.

It is showed by acpi_memory_register_notify_handler() which is called by
acpi_walk_namespace().

acpi_walk_namespace() parses all of ACPI's namespace and execute
acpi_memory_register_notify_handler().  So, it is called for all of the
device which is defined in namespace.  If the parsing device is not memory,
acpi_memhotplug ignores it due to "no match" and will parse next device.
This is normal route, not an exception.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/acpi_memhotplug.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index b0d4b147b19..1dda370f402 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -484,10 +484,8 @@ acpi_memory_register_notify_handler(acpi_handle handle,
 
 
 	status = is_memory_device(handle);
-	if (ACPI_FAILURE(status)){
-		ACPI_EXCEPTION((AE_INFO, status, "handle is no memory device"));
+	if (ACPI_FAILURE(status))
 		return AE_OK;	/* continue */
-	}
 
 	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
 					     acpi_memory_device_notify, NULL);
@@ -503,10 +501,8 @@ acpi_memory_deregister_notify_handler(acpi_handle handle,
 
 
 	status = is_memory_device(handle);
-	if (ACPI_FAILURE(status)){
-		ACPI_EXCEPTION((AE_INFO, status, "handle is no memory device"));
+	if (ACPI_FAILURE(status))
 		return AE_OK;	/* continue */
-	}
 
 	status = acpi_remove_notify_handler(handle,
 					    ACPI_SYSTEM_NOTIFY,
-- 
cgit v1.2.3-18-g5258


From 5672bde6355f2d12c49df1eec083d25afe489063 Mon Sep 17 00:00:00 2001
From: Handle X <xhandle@gmail.com>
Date: Mon, 14 Aug 2006 22:37:27 -0700
Subject: ACPI: hotkey.c fixes, fix for potential crash of hotkey.c

While going through the code, I found out some memory leaks and potential
crashes in drivers/acpi/hotkey.c Please find the patch to fix them.

This patch does the following,

1. Fixes memory leaks in error paths of hotkey_write_config

2. Fixes freeing unallocated pointers in the error paths of hotkey_write_config

3. Uses a loop instead of linear searching for parsing the userspace
   input in get_params

4. Uses array of char * instead of passing 4 pointer parameters
   explicitly into the init_{poll_}hotkey_* static functions

Signed-off-by: Andrew Morton <akpm@osdl.org>
Acked-by: Luming Yu <luming.yu@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/hotkey.c | 281 +++++++++++++++++++++-----------------------------
 1 file changed, 119 insertions(+), 162 deletions(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/hotkey.c b/drivers/acpi/hotkey.c
index 32c9d88fd19..1ba2db67186 100644
--- a/drivers/acpi/hotkey.c
+++ b/drivers/acpi/hotkey.c
@@ -91,6 +91,14 @@ enum {
 	HK_EVENT_ENTERRING_S5,
 };
 
+enum conf_entry_enum {
+	bus_handle = 0,
+	bus_method = 1,
+	action_handle = 2,
+	method = 3,
+	LAST_CONF_ENTRY
+};
+
 /*  procdir we use */
 static struct proc_dir_entry *hotkey_proc_dir;
 static struct proc_dir_entry *hotkey_config;
@@ -244,19 +252,15 @@ static int hotkey_info_open_fs(struct inode *inode, struct file *file)
 
 static char *format_result(union acpi_object *object)
 {
-	char *buf = NULL;
-
-	buf = (char *)kmalloc(RESULT_STR_LEN, GFP_KERNEL);
-	if (buf)
-		memset(buf, 0, RESULT_STR_LEN);
-	else
-		goto do_fail;
+	char *buf;
 
+	buf = kzalloc(RESULT_STR_LEN, GFP_KERNEL);
+	if (!buf)
+		return NULL;
 	/* Now, just support integer type */
 	if (object->type == ACPI_TYPE_INTEGER)
 		sprintf(buf, "%d\n", (u32) object->integer.value);
-      do_fail:
-	return (buf);
+	return buf;
 }
 
 static int hotkey_polling_seq_show(struct seq_file *seq, void *offset)
@@ -486,98 +490,102 @@ static void free_hotkey_device(union acpi_hotkey *key)
 
 static void free_hotkey_buffer(union acpi_hotkey *key)
 {
+	/* key would never be null, action method could be */
 	kfree(key->event_hotkey.action_method);
 }
 
 static void free_poll_hotkey_buffer(union acpi_hotkey *key)
 {
+	/* key would never be null, others could be*/
 	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)
+init_hotkey_device(union acpi_hotkey *key, char **config_entry,
+		   int std_num, int external_num)
 {
 	acpi_handle tmp_handle;
 	acpi_status status = AE_OK;
 
-
 	if (std_num < 0 || IS_POLL(std_num) || !key)
 		goto do_fail;
 
-	if (!bus_str || !action_str || !method)
+	if (!config_entry[bus_handle] || !config_entry[action_handle]
+			|| !config_entry[method])
 		goto do_fail;
 
 	key->link.hotkey_type = ACPI_HOTKEY_EVENT;
 	key->link.hotkey_standard_num = std_num;
 	key->event_hotkey.flag = 0;
-	key->event_hotkey.action_method = method;
+	key->event_hotkey.action_method = config_entry[method];
 
-	status =
-	    acpi_get_handle(NULL, bus_str, &(key->event_hotkey.bus_handle));
+	status = acpi_get_handle(NULL, config_entry[bus_handle],
+			   &(key->event_hotkey.bus_handle));
 	if (ACPI_FAILURE(status))
-		goto do_fail;
+		goto do_fail_zero;
 	key->event_hotkey.external_hotkey_num = external_num;
-	status =
-	    acpi_get_handle(NULL, action_str,
+	status = acpi_get_handle(NULL, config_entry[action_handle],
 			    &(key->event_hotkey.action_handle));
 	if (ACPI_FAILURE(status))
-		goto do_fail;
+		goto do_fail_zero;
 	status = acpi_get_handle(key->event_hotkey.action_handle,
-				 method, &tmp_handle);
+				 config_entry[method], &tmp_handle);
 	if (ACPI_FAILURE(status))
-		goto do_fail;
+		goto do_fail_zero;
 	return AE_OK;
-      do_fail:
+do_fail_zero:
+	key->event_hotkey.action_method = NULL;
+do_fail:
 	return -ENODEV;
 }
 
 static int
-init_poll_hotkey_device(union acpi_hotkey *key,
-			char *poll_str,
-			char *poll_method,
-			char *action_str, char *action_method, int std_num)
+init_poll_hotkey_device(union acpi_hotkey *key, char **config_entry,
+			int std_num)
 {
 	acpi_status status = AE_OK;
 	acpi_handle tmp_handle;
 
-
 	if (std_num < 0 || IS_EVENT(std_num) || !key)
 		goto do_fail;
-
-	if (!poll_str || !poll_method || !action_str || !action_method)
+	if (!config_entry[bus_handle] ||!config_entry[bus_method] ||
+		!config_entry[action_handle] || !config_entry[method])
 		goto do_fail;
 
 	key->link.hotkey_type = ACPI_HOTKEY_POLLING;
 	key->link.hotkey_standard_num = std_num;
 	key->poll_hotkey.flag = 0;
-	key->poll_hotkey.poll_method = poll_method;
-	key->poll_hotkey.action_method = action_method;
+	key->poll_hotkey.poll_method = config_entry[bus_method];
+	key->poll_hotkey.action_method = config_entry[method];
 
-	status =
-	    acpi_get_handle(NULL, poll_str, &(key->poll_hotkey.poll_handle));
+	status = acpi_get_handle(NULL, config_entry[bus_handle],
+		      &(key->poll_hotkey.poll_handle));
 	if (ACPI_FAILURE(status))
-		goto do_fail;
+		goto do_fail_zero;
 	status = acpi_get_handle(key->poll_hotkey.poll_handle,
-				 poll_method, &tmp_handle);
+				 config_entry[bus_method], &tmp_handle);
 	if (ACPI_FAILURE(status))
-		goto do_fail;
+		goto do_fail_zero;
 	status =
-	    acpi_get_handle(NULL, action_str,
+	    acpi_get_handle(NULL, config_entry[action_handle],
 			    &(key->poll_hotkey.action_handle));
 	if (ACPI_FAILURE(status))
-		goto do_fail;
+		goto do_fail_zero;
 	status = acpi_get_handle(key->poll_hotkey.action_handle,
-				 action_method, &tmp_handle);
+				 config_entry[method], &tmp_handle);
 	if (ACPI_FAILURE(status))
-		goto do_fail;
+		goto do_fail_zero;
 	key->poll_hotkey.poll_result =
 	    (union acpi_object *)kmalloc(sizeof(union acpi_object), GFP_KERNEL);
 	if (!key->poll_hotkey.poll_result)
-		goto do_fail;
+		goto do_fail_zero;
 	return AE_OK;
-      do_fail:
+
+do_fail_zero:
+	key->poll_hotkey.poll_method = NULL;
+	key->poll_hotkey.action_method = NULL;
+do_fail:
 	return -ENODEV;
 }
 
@@ -652,17 +660,18 @@ static int hotkey_poll_config_seq_show(struct seq_file *seq, void *offset)
 }
 
 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)
+get_parms(char *config_record, int *cmd, char **config_entry,
+	       int *internal_event_num, int *external_event_num)
 {
+/* the format of *config_record =
+ * "1:\d+:*" : "cmd:internal_event_num"
+ * "\d+:\w+:\w+:\w+:\w+:\d+:\d+" :
+ * "cmd:bus_handle:bus_method:action_handle:method:internal_event_num:external_event_num"
+ */
 	char *tmp, *tmp1, count;
+	int i;
 
 	sscanf(config_record, "%d", cmd);
-
 	if (*cmd == 1) {
 		if (sscanf(config_record, "%d:%d", cmd, internal_event_num) !=
 		    2)
@@ -674,59 +683,27 @@ get_parms(char *config_record,
 	if (!tmp)
 		goto do_fail;
 	tmp++;
-	tmp1 = strchr(tmp, ':');
-	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, ':');
-	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, ':');
-	if (!tmp1)
-		goto do_fail;
-	count = tmp1 - tmp;
-	*action_handle = (char *)kmalloc(count + 1, GFP_KERNEL);
-	if (!*action_handle)
-		goto do_fail;
-	strncpy(*action_handle, tmp, count);
-	*(*action_handle + count) = 0;
-
-	tmp = tmp1;
-	tmp++;
-	tmp1 = strchr(tmp, ':');
-	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;
-
-	return 6;
-      do_fail:
+	for (i = 0; i < LAST_CONF_ENTRY; i++) {
+		tmp1 = strchr(tmp, ':');
+		if (!tmp1) {
+			goto do_fail;
+		}
+		count = tmp1 - tmp;
+		config_entry[i] = kzalloc(count + 1, GFP_KERNEL);
+		if (!config_entry[i])
+			goto handle_failure;
+		strncpy(config_entry[i], tmp, count);
+		tmp = tmp1 + 1;
+	}
+	if (sscanf(tmp, "%d:%d", internal_event_num, external_event_num) <= 0)
+		goto handle_failure;
+	if (!IS_OTHERS(*internal_event_num)) {
+		return 6;
+	}
+handle_failure:
+	while (i-- > 0)
+		kfree(config_entry[i]);
+do_fail:
 	return -1;
 }
 
@@ -736,50 +713,34 @@ static ssize_t hotkey_write_config(struct file *file,
 				   size_t count, loff_t * data)
 {
 	char *config_record = NULL;
-	char *bus_handle = NULL;
-	char *bus_method = NULL;
-	char *action_handle = NULL;
-	char *method = NULL;
+	char *config_entry[LAST_CONF_ENTRY];
 	int cmd, internal_event_num, external_event_num;
 	int ret = 0;
-	union acpi_hotkey *key = NULL;
+	union acpi_hotkey *key = kzalloc(sizeof(union acpi_hotkey), GFP_KERNEL);
 
+	if (!key)
+		return -ENOMEM;
 
-	config_record = (char *)kmalloc(count + 1, GFP_KERNEL);
-	if (!config_record)
+	config_record = kzalloc(count + 1, GFP_KERNEL);
+	if (!config_record) {
+		kfree(key);
 		return -ENOMEM;
+	}
 
 	if (copy_from_user(config_record, buffer, count)) {
 		kfree(config_record);
+		kfree(key);
 		printk(KERN_ERR PREFIX "Invalid data\n");
 		return -EINVAL;
 	}
-	config_record[count] = 0;
-
-	ret = get_parms(config_record,
-			&cmd,
-			&bus_handle,
-			&bus_method,
-			&action_handle,
-			&method, &internal_event_num, &external_event_num);
-
+	ret = get_parms(config_record, &cmd, config_entry,
+		       &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);
 		printk(KERN_ERR PREFIX "Invalid data format ret=%d\n", ret);
 		return -EINVAL;
 	}
 
-	key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL);
-	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,
@@ -791,34 +752,19 @@ static ssize_t hotkey_write_config(struct file *file,
 		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);
-	} 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);
-		printk(KERN_ERR PREFIX "Invalid hotkey\n");
-		return -EINVAL;
+		if (init_hotkey_device(key, config_entry,
+			internal_event_num, external_event_num))
+			goto init_hotkey_fail;
+	} else {
+		if (init_poll_hotkey_device(key, config_entry,
+			       internal_event_num))
+			goto init_poll_hotkey_fail;
 	}
-
-      cont_cmd:
-	kfree(bus_handle);
-	kfree(action_handle);
-
+cont_cmd:
 	switch (cmd) {
 	case 0:
-		if (get_hotkey_by_event
-		    (&global_hotkey_list, key->link.hotkey_standard_num))
+		if (get_hotkey_by_event(&global_hotkey_list,
+				key->link.hotkey_standard_num))
 			goto fail_out;
 		else
 			hotkey_add(key);
@@ -827,6 +773,7 @@ static ssize_t hotkey_write_config(struct file *file,
 		hotkey_remove(key);
 		break;
 	case 2:
+		/* key is kfree()ed if matched*/
 		if (hotkey_update(key))
 			goto fail_out;
 		break;
@@ -835,11 +782,22 @@ static ssize_t hotkey_write_config(struct file *file,
 		break;
 	}
 	return count;
-      fail_out:
-	if (IS_EVENT(internal_event_num))
-		free_hotkey_buffer(key);
-	else
-		free_poll_hotkey_buffer(key);
+
+init_poll_hotkey_fail:		/* failed init_poll_hotkey_device */
+	kfree(config_entry[bus_method]);
+	config_entry[bus_method] = NULL;
+init_hotkey_fail:		/* failed init_hotkey_device */
+	kfree(config_entry[method]);
+fail_out:
+	kfree(config_entry[bus_handle]);
+	kfree(config_entry[action_handle]);
+	/* No double free since elements =NULL for error cases */
+	if (IS_EVENT(internal_event_num)) {
+		if (config_entry[bus_method])
+			kfree(config_entry[bus_method]);
+		free_hotkey_buffer(key);	/* frees [method] */
+	} else
+		free_poll_hotkey_buffer(key);  /* frees [bus_method]+[method] */
 	kfree(key);
 	printk(KERN_ERR PREFIX "invalid key\n");
 	return -EINVAL;
@@ -923,10 +881,9 @@ static ssize_t hotkey_execute_aml_method(struct file *file,
 	union acpi_hotkey *key;
 
 
-	arg = (char *)kmalloc(count + 1, GFP_KERNEL);
+	arg = kzalloc(count + 1, GFP_KERNEL);
 	if (!arg)
 		return -ENOMEM;
-	arg[count] = 0;
 
 	if (copy_from_user(arg, buffer, count)) {
 		kfree(arg);
-- 
cgit v1.2.3-18-g5258


From d68909f4c3eee09c13d4e5c86512c6c075553dbd Mon Sep 17 00:00:00 2001
From: Len Brown <len.brown@intel.com>
Date: Wed, 16 Aug 2006 19:16:58 -0400
Subject: ACPI: avoid irqrouter_resume might_sleep oops on resume from S4

__might_sleep+0x8e/0x93
acpi_os_wait_semaphore+0x50/0xa3
acpi_ut_acquire_mutex+0x28/0x6a
acpi_ns_get_node+0x46/0x88
acpi_ns_evaluate+0x2d/0xfc
acpi_rs_set_srs_method_data+0xc5/0xe1
acpi_set_current_resources+0x31/0x3f
acpi_pci_link_set+0xfc/0x1a5
irqrouter_resume+0x48/0x5f

and

__might_sleep+0x8e/0x93
kmem_cache_alloc+0x2a/0x8f
acpi_evaluate_integer+0x32/0x96
acpi_bus_get_status+0x30/0x84
acpi_pci_link_set+0x12a/0x1a5
irqrouter_resume+0x48/0x5f

http://bugzilla.kernel.org/show_bug.cgi?id=6810

Signed-off-by: Len Brown <len.brown@intel.com>
---
 drivers/acpi/osl.c   | 10 ++++++++++
 drivers/acpi/utils.c |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

(limited to 'drivers/acpi')

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index b7d1514cd19..507f051d1ce 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -746,6 +746,16 @@ acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
 	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
 			  handle, units, timeout));
 
+	/*
+	 * This can be called during resume with interrupts off.
+	 * Like boot-time, we should be single threaded and will
+	 * always get the lock if we try -- timeout or not.
+	 * If this doesn't succeed, then we will oops courtesy of
+	 * might_sleep() in down().
+	 */
+	if (!down_trylock(sem))
+		return AE_OK;
+
 	switch (timeout) {
 		/*
 		 * No Wait:
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index f48227f4c8c..d0d84c43a9d 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -262,7 +262,7 @@ acpi_evaluate_integer(acpi_handle handle,
 	if (!data)
 		return AE_BAD_PARAMETER;
 
-	element = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
+	element = kmalloc(sizeof(union acpi_object), irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL);
 	if (!element)
 		return AE_NO_MEMORY;
 
-- 
cgit v1.2.3-18-g5258