wmi: check find_guid() return value to prevent oops

Commit Message

Len Brown Dec. 30, 2009, 6:19 a.m. UTC

None

Patch

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 9f93d6c..cc9ad74 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -492,8 +492,7 @@  wmi_notify_handler handler, void *data)
 	if (!guid || !handler)
 		return AE_BAD_PARAMETER;
 
-	find_guid(guid, &block);
-	if (!block)
+	if (!find_guid(guid, &block))
 		return AE_NOT_EXIST;
 
 	if (block->handler)
@@ -521,8 +520,7 @@  acpi_status wmi_remove_notify_handler(const char *guid)
 	if (!guid)
 		return AE_BAD_PARAMETER;
 
-	find_guid(guid, &block);
-	if (!block)
+	if (!find_guid(guid, &block))
 		return AE_NOT_EXIST;
 
 	if (!block->handler)