4 files changed, 7 insertions, 6 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 5b6760e0f957..2d1955c11833 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -373,10 +373,11 @@ int acpi_bus_receive_event(struct acpi_bus_event *event)
         }
 
         spin_lock_irqsave(&acpi_bus_event_lock, flags);
-        entry =
-            list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node);
-        if (entry)
+        if (!list_empty(&acpi_bus_event_list)) {
+                entry = list_entry(acpi_bus_event_list.next,
+                                   struct acpi_bus_event, node);
                 list_del(&entry->node);
+        }
         spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
 
         if (!entry)
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 36a68fa114e3..a825b431b64f 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -822,7 +822,7 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
         }
 
         processors[pr->id] = NULL;
-
+        processor_device_array[pr->id] = NULL;
         kfree(pr);
 
         return 0;
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index c4e00ac8ea85..1bcecc7dd2ca 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -1125,7 +1125,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
                         tz->trips.active[i].flags.valid; i++, trips++);
         tz->thermal_zone = thermal_zone_device_register("ACPI thermal zone",
                                         trips, tz, &acpi_thermal_zone_ops);
-        if (!tz->thermal_zone)
+        if (IS_ERR(tz->thermal_zone))
                 return -ENODEV;
 
         result = sysfs_create_link(&tz->device->dev.kobj,
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 12fb44f16766..980a74188781 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -713,7 +713,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 
         kfree(obj);
 
-        if (device->cap._BCL && device->cap._BCM && max_level > 0) {
+        if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
                 int result;
                 static int count = 0;
                 char *name;