diff --git a/QCamera2/HAL/QCamera2HWI.cpp b/QCamera2/HAL/QCamera2HWI.cpp
index 5ae33a8..524da8d 100644
--- a/QCamera2/HAL/QCamera2HWI.cpp
+++ b/QCamera2/HAL/QCamera2HWI.cpp
@@ -1401,7 +1401,8 @@
     int rc = NO_ERROR;
 
     if ( ( !m_stateMachine.isPreviewRunning() ) &&
-         ( m_channels[QCAMERA_CH_TYPE_PREVIEW] == NULL ) ) {
+            !m_stateMachine.isPreviewReady() &&
+            ( m_channels[QCAMERA_CH_TYPE_PREVIEW] == NULL ) ) {
         rc = addChannel(QCAMERA_CH_TYPE_PREVIEW);
     }
 
@@ -1423,7 +1424,8 @@
 int QCamera2HardwareInterface::releaseTorchCamera()
 {
     if ( !m_stateMachine.isPreviewRunning() &&
-         ( m_channels[QCAMERA_CH_TYPE_PREVIEW] != NULL ) ) {
+            !m_stateMachine.isPreviewReady() &&
+            ( m_channels[QCAMERA_CH_TYPE_PREVIEW] != NULL ) ) {
         delete m_channels[QCAMERA_CH_TYPE_PREVIEW];
         m_channels[QCAMERA_CH_TYPE_PREVIEW] = NULL;
     }
diff --git a/QCamera2/HAL/QCameraStateMachine.cpp b/QCamera2/HAL/QCameraStateMachine.cpp
index 9dc67e9..65054ae 100644
--- a/QCamera2/HAL/QCameraStateMachine.cpp
+++ b/QCamera2/HAL/QCameraStateMachine.cpp
@@ -2912,6 +2912,26 @@
 }
 
 /*===========================================================================
+ * FUNCTION   : isPreviewReady
+ *
+ * DESCRIPTION: check if preview is in ready state.
+ *
+ * PARAMETERS : None
+ *
+ * RETURN     : true -- preview is in ready state
+ *              false -- preview is stopped
+ *==========================================================================*/
+bool QCameraStateMachine::isPreviewReady()
+{
+    switch (m_state) {
+    case QCAMERA_SM_STATE_PREVIEW_READY:
+        return true;
+    default:
+        return false;
+    }
+}
+
+/*===========================================================================
  * FUNCTION   : isCaptureRunning
  *
  * DESCRIPTION: check if image capture is in process.
diff --git a/QCamera2/HAL/QCameraStateMachine.h b/QCamera2/HAL/QCameraStateMachine.h
index 5da517e..da21433 100644
--- a/QCamera2/HAL/QCameraStateMachine.h
+++ b/QCamera2/HAL/QCameraStateMachine.h
@@ -169,6 +169,7 @@
     int32_t procEvt(qcamera_sm_evt_enum_t evt, void *evt_payload);
 
     bool isPreviewRunning(); // check if preview is running
+    bool isPreviewReady(); // check if preview is ready
     bool isCaptureRunning(); // check if image capture is running
     bool isNonZSLCaptureRunning(); // check if image capture is running in non ZSL mode