9 files changed, 40 insertions, 13 deletions

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 96309b9660da..11abc7bf777e 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/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index b0d4b147b19e..1dda370f402b 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,
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 6e5221707d97..9810e2a55d0a 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;
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index b2977695e120..279c4bac92e5 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>
@@ -68,7 +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;
         }
 
@@ -192,7 +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;
         }
@@ -738,7 +740,10 @@ 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();
 
diff --git a/drivers/acpi/i2c_ec.c b/drivers/acpi/i2c_ec.c
index 84239d51dc0c..6809c283ec58 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;
         }
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index b7d1514cd199..507f051d1cef 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/sbs.c b/drivers/acpi/sbs.c
index db7b350a5035..62bef0b3b614 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
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5fcb50c7b778..698a1540e303 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) {
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index f48227f4c8c9..d0d84c43a9d4 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;