diff --git a/drm/common/DrmSupportInfo.cpp b/drm/common/DrmSupportInfo.cpp
index 3dee435..5400bdd 100644
--- a/drm/common/DrmSupportInfo.cpp
+++ b/drm/common/DrmSupportInfo.cpp
@@ -43,6 +43,10 @@
 }
 
 bool DrmSupportInfo::isSupportedMimeType(const String8& mimeType) const {
+    if (String8("") == mimeType) {
+        return false;
+    }
+
     for (unsigned int i = 0; i < mMimeTypeVector.size(); i++) {
         const String8 item = mMimeTypeVector.itemAt(i);
 
diff --git a/drm/common/IDrmManagerService.cpp b/drm/common/IDrmManagerService.cpp
index 458f1b6..2d8e877 100644
--- a/drm/common/IDrmManagerService.cpp
+++ b/drm/common/IDrmManagerService.cpp
@@ -107,6 +107,7 @@
         handle->decryptInfo = NULL;
     }
     handle->copyControlVector.clear();
+    handle->extendedData.clear();
 }
 
 int BpDrmManagerService::addUniqueId(int uniqueId) {
diff --git a/drm/libdrmframework/DrmManagerClientImpl.cpp b/drm/libdrmframework/DrmManagerClientImpl.cpp
index a57dd98..a36bd4a 100644
--- a/drm/libdrmframework/DrmManagerClientImpl.cpp
+++ b/drm/libdrmframework/DrmManagerClientImpl.cpp
@@ -145,7 +145,6 @@
 
 status_t DrmManagerClientImpl::saveRights(int uniqueId, const DrmRights& drmRights,
             const String8& rightsPath, const String8& contentPath) {
-    status_t status = DRM_ERROR_UNKNOWN;
     return getDrmManagerService()->saveRights(
                 uniqueId, drmRights, rightsPath, contentPath);
 }