diff --git a/dsp/rtac.c b/dsp/rtac.c
index a4dec9a..47f205d 100644
--- a/dsp/rtac.c
+++ b/dsp/rtac.c
@@ -126,6 +126,10 @@
 struct mutex			rtac_voice_mutex;
 struct mutex			rtac_voice_apr_mutex;
 struct mutex			rtac_afe_apr_mutex;
+struct mutex			rtac_asm_cal_mutex;
+struct mutex			rtac_adm_cal_mutex;
+struct mutex			rtac_afe_cal_mutex;
+struct mutex			rtac_voice_cal_mutex;
 
 int rtac_clear_mapping(uint32_t cal_type)
 {
@@ -1730,42 +1734,62 @@
 	}
 
 	case AUDIO_GET_RTAC_ADM_CAL:
+		mutex_lock(&rtac_adm_cal_mutex);
 		result = send_adm_apr((void *)arg, ADM_CMD_GET_PP_PARAMS_V5);
+		mutex_unlock(&rtac_adm_cal_mutex);
 		break;
 	case AUDIO_SET_RTAC_ADM_CAL:
+		mutex_lock(&rtac_adm_cal_mutex);
 		result = send_adm_apr((void *)arg, ADM_CMD_SET_PP_PARAMS_V5);
+		mutex_unlock(&rtac_adm_cal_mutex);
 		break;
 	case AUDIO_GET_RTAC_ASM_CAL:
+		mutex_lock(&rtac_asm_cal_mutex);
 		result = send_rtac_asm_apr((void *)arg,
 			ASM_STREAM_CMD_GET_PP_PARAMS_V2);
+		mutex_unlock(&rtac_asm_cal_mutex);
 		break;
 	case AUDIO_SET_RTAC_ASM_CAL:
+		mutex_lock(&rtac_asm_cal_mutex);
 		result = send_rtac_asm_apr((void *)arg,
 			ASM_STREAM_CMD_SET_PP_PARAMS_V2);
+		mutex_unlock(&rtac_asm_cal_mutex);
 		break;
 	case AUDIO_GET_RTAC_CVS_CAL:
+		mutex_lock(&rtac_voice_cal_mutex);
 		result = send_voice_apr(RTAC_CVS, (void *) arg,
 					VSS_ICOMMON_CMD_GET_PARAM_V2);
+		mutex_unlock(&rtac_voice_cal_mutex);
 		break;
 	case AUDIO_SET_RTAC_CVS_CAL:
+		mutex_lock(&rtac_voice_cal_mutex);
 		result = send_voice_apr(RTAC_CVS, (void *) arg,
 					VSS_ICOMMON_CMD_SET_PARAM_V2);
+		mutex_unlock(&rtac_voice_cal_mutex);
 		break;
 	case AUDIO_GET_RTAC_CVP_CAL:
+		mutex_lock(&rtac_voice_cal_mutex);
 		result = send_voice_apr(RTAC_CVP, (void *) arg,
 					VSS_ICOMMON_CMD_GET_PARAM_V2);
+		mutex_unlock(&rtac_voice_cal_mutex);
 		break;
 	case AUDIO_SET_RTAC_CVP_CAL:
+		mutex_lock(&rtac_voice_cal_mutex);
 		result = send_voice_apr(RTAC_CVP, (void *) arg,
 					VSS_ICOMMON_CMD_SET_PARAM_V2);
+		mutex_unlock(&rtac_voice_cal_mutex);
 		break;
 	case AUDIO_GET_RTAC_AFE_CAL:
+		mutex_lock(&rtac_afe_cal_mutex);
 		result = send_rtac_afe_apr((void *)arg,
 			AFE_PORT_CMD_GET_PARAM_V2);
+		mutex_unlock(&rtac_afe_cal_mutex);
 		break;
 	case AUDIO_SET_RTAC_AFE_CAL:
+		mutex_lock(&rtac_afe_cal_mutex);
 		result = send_rtac_afe_apr((void *)arg,
 			AFE_PORT_CMD_SET_PARAM_V2);
+		mutex_unlock(&rtac_afe_cal_mutex);
 		break;
 	default:
 		pr_err("%s: Invalid IOCTL, command = %d!\n",
@@ -1902,6 +1926,7 @@
 	init_waitqueue_head(&rtac_adm_apr_data.cmd_wait);
 	mutex_init(&rtac_adm_mutex);
 	mutex_init(&rtac_adm_apr_mutex);
+	mutex_init(&rtac_adm_cal_mutex);
 
 	rtac_adm_buffer = kzalloc(
 		rtac_cal[ADM_RTAC_CAL].map_data.map_size, GFP_KERNEL);
@@ -1915,6 +1940,7 @@
 		init_waitqueue_head(&rtac_asm_apr_data[i].cmd_wait);
 	}
 	mutex_init(&rtac_asm_apr_mutex);
+	mutex_init(&rtac_asm_cal_mutex);
 
 	rtac_asm_buffer = kzalloc(
 		rtac_cal[ASM_RTAC_CAL].map_data.map_size, GFP_KERNEL);
@@ -1928,6 +1954,7 @@
 	atomic_set(&rtac_afe_apr_data.cmd_state, 0);
 	init_waitqueue_head(&rtac_afe_apr_data.cmd_wait);
 	mutex_init(&rtac_afe_apr_mutex);
+	mutex_init(&rtac_afe_cal_mutex);
 
 	rtac_afe_buffer = kzalloc(
 		rtac_cal[AFE_RTAC_CAL].map_data.map_size, GFP_KERNEL);
@@ -1946,6 +1973,7 @@
 	}
 	mutex_init(&rtac_voice_mutex);
 	mutex_init(&rtac_voice_apr_mutex);
+	mutex_init(&rtac_voice_cal_mutex);
 
 	rtac_voice_buffer = kzalloc(
 		rtac_cal[VOICE_RTAC_CAL].map_data.map_size, GFP_KERNEL);