diff --git a/broadcastradio/1.1/default/Tuner.cpp b/broadcastradio/1.1/default/Tuner.cpp
index 2985d42..0723cf7 100644
--- a/broadcastradio/1.1/default/Tuner.cpp
+++ b/broadcastradio/1.1/default/Tuner.cpp
@@ -66,6 +66,8 @@
 
 Return<Result> Tuner::setConfiguration(const BandConfig& config) {
     ALOGV("%s", __func__);
+    lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return Result::NOT_INITIALIZED;
 
     if (config.lowerLimit >= config.upperLimit) return Result::INVALID_ARGUMENTS;
 
@@ -87,14 +89,14 @@
 
 Return<void> Tuner::getConfiguration(getConfiguration_cb _hidl_cb) {
     ALOGV("%s", __func__);
-
     lock_guard<mutex> lk(mMut);
-    if (mIsAmfmConfigSet) {
+
+    if (!mIsClosed && mIsAmfmConfigSet) {
         _hidl_cb(Result::OK, mAmfmConfig);
     } else {
         _hidl_cb(Result::NOT_INITIALIZED, {});
     }
-    return Void();
+    return {};
 }
 
 // makes ProgramInfo that points to no program
@@ -140,6 +142,8 @@
 Return<Result> Tuner::scan(Direction direction, bool skipSubChannel __unused) {
     ALOGV("%s", __func__);
     lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return Result::NOT_INITIALIZED;
+
     vector<VirtualProgram> list;
 
     if (isFmLocked()) {
@@ -196,9 +200,10 @@
 
 Return<Result> Tuner::step(Direction direction, bool skipSubChannel) {
     ALOGV("%s", __func__);
-    ALOGW_IF(!skipSubChannel, "can't step to next frequency without ignoring subChannel");
-
     lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return Result::NOT_INITIALIZED;
+
+    ALOGW_IF(!skipSubChannel, "can't step to next frequency without ignoring subChannel");
 
     if (!utils::isAmFm(utils::getType(mCurrentProgram))) {
         ALOGE("Can't step in anything else than AM/FM");
@@ -244,8 +249,8 @@
 
 Return<Result> Tuner::tune_1_1(const ProgramSelector& sel) {
     ALOGV("%s(%s)", __func__, toString(sel).c_str());
-
     lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return Result::NOT_INITIALIZED;
 
     if (utils::isAmFm(utils::getType(mCurrentProgram))) {
         ALOGW_IF(!mIsAmfmConfigSet, "AM/FM config not set");
@@ -269,12 +274,18 @@
 
 Return<Result> Tuner::cancel() {
     ALOGV("%s", __func__);
+    lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return Result::NOT_INITIALIZED;
+
     mThread.cancelAll();
     return Result::OK;
 }
 
 Return<Result> Tuner::cancelAnnouncement() {
     ALOGV("%s", __func__);
+    lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return Result::NOT_INITIALIZED;
+
     return Result::OK;
 }
 
@@ -287,46 +298,64 @@
 
 Return<void> Tuner::getProgramInformation_1_1(getProgramInformation_1_1_cb _hidl_cb) {
     ALOGV("%s", __func__);
-
     lock_guard<mutex> lk(mMut);
-    if (mIsTuneCompleted) {
+
+    if (mIsClosed) {
+        _hidl_cb(Result::NOT_INITIALIZED, {});
+    } else if (mIsTuneCompleted) {
         _hidl_cb(Result::OK, mCurrentProgramInfo);
     } else {
         _hidl_cb(Result::NOT_INITIALIZED, makeDummyProgramInfo(mCurrentProgram));
     }
-    return Void();
+    return {};
 }
 
 Return<ProgramListResult> Tuner::startBackgroundScan() {
     ALOGV("%s", __func__);
+    lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return ProgramListResult::NOT_INITIALIZED;
+
     return ProgramListResult::UNAVAILABLE;
 }
 
-Return<void> Tuner::getProgramList(const hidl_string& filter __unused, getProgramList_cb _hidl_cb) {
-    ALOGV("%s", __func__);
+Return<void> Tuner::getProgramList(const hidl_string& filter, getProgramList_cb _hidl_cb) {
+    ALOGV("%s(%s)", __func__, filter.c_str());
     lock_guard<mutex> lk(mMut);
+    if (mIsClosed) {
+        _hidl_cb(ProgramListResult::NOT_INITIALIZED, {});
+        return {};
+    }
 
     auto& virtualRadio = mVirtualFm;
     if (!isFmLocked()) {
         ALOGI("bands other than FM are not supported yet");
         _hidl_cb(ProgramListResult::OK, {});
-        return Void();
+        return {};
     }
 
     auto list = virtualRadio.getProgramList();
     ALOGD("returning a list of %zu programs", list.size());
-    _hidl_cb(ProgramListResult::OK, vector<ProgramInfo>(list.begin(), list.end()));
-    return Void();
+    _hidl_cb(ProgramListResult::OK, hidl_vec<ProgramInfo>(list.begin(), list.end()));
+    return {};
 }
 
 Return<void> Tuner::isAnalogForced(isAnalogForced_cb _hidl_cb) {
     ALOGV("%s", __func__);
-    _hidl_cb(Result::OK, mIsAnalogForced);
-    return Void();
+    lock_guard<mutex> lk(mMut);
+
+    if (mIsClosed) {
+        _hidl_cb(Result::NOT_INITIALIZED, false);
+    } else {
+        _hidl_cb(Result::OK, mIsAnalogForced);
+    }
+    return {};
 }
 
 Return<Result> Tuner::setAnalogForced(bool isForced) {
     ALOGV("%s", __func__);
+    lock_guard<mutex> lk(mMut);
+    if (mIsClosed) return Result::NOT_INITIALIZED;
+
     mIsAnalogForced = isForced;
     return Result::OK;
 }