diff --git a/src/src/radio.c b/src/src/radio.c
index f616db3e..4c78c33d 100644
--- a/src/src/radio.c
+++ b/src/src/radio.c
@@ -233,6 +233,8 @@ typedef struct
     uint8_t              sReceivePsdu[IEEE802154_MAX_LENGTH];
 } rxBuffer;
 
+typedef uint8_t rxBufferIndex_t;
+
 static volatile energyScanStatus sEnergyScanStatus;
 static volatile int8_t           sEnergyScanResultDbm;
 static energyScanMode            sEnergyScanMode;
@@ -338,7 +340,7 @@ static bool isMultiChannel(void)
             {
                 firstChannel = sChannelSwitchingCfg.channels[i];
             }
-            else
+            else if (firstChannel != sChannelSwitchingCfg.channels[i])
             {
                 return true;
             }
@@ -480,7 +482,6 @@ static void sli_get_default_and_max_powers_across_iids(int8_t  *defaultTxPower,
             // We have already validated that sDefaultTxPower holds a valid value.
             *defaultTxPower = (*defaultTxPower == SL_INVALID_TX_POWER) ? sDefaultTxPower[iid]
                                                                        : SL_MAX(*defaultTxPower, sDefaultTxPower[iid]);
-            ;
         }
     }
 }
@@ -1530,8 +1531,7 @@ otError otPlatRadioReceive(otInstance *aInstance, uint8_t aChannel)
     int8_t           txPower;
 
     OT_UNUSED_VARIABLE(aInstance);
-
-    otEXPECT_ACTION((getInternalFlag(FLAG_ONGOING_TX_DATA) == 0) && sEnergyScanStatus != ENERGY_SCAN_STATUS_IN_PROGRESS,
+    otEXPECT_ACTION(!getInternalFlag(FLAG_ONGOING_TX_DATA) && sEnergyScanStatus != ENERGY_SCAN_STATUS_IN_PROGRESS,
                     error = OT_ERROR_INVALID_STATE);
 
 #if FAST_CHANNEL_SWITCHING_SUPPORT
@@ -1573,7 +1573,6 @@ otError otPlatRadioReceiveAt(otInstance *aInstance, uint8_t aChannel, uint32_t a
     otError          error = OT_ERROR_NONE;
     RAIL_Status_t    status;
     efr32BandConfig *config;
-    // uint8_t          iid     = otNcpPlatGetCurCommandIid();
     int8_t           txPower = sli_get_max_tx_power_across_iids();
 
     OT_UNUSED_VARIABLE(aInstance);
@@ -2520,7 +2519,7 @@ static void packetReceivedCallback(RAIL_RxPacketHandle_t packetHandle)
 {
     RAIL_RxPacketInfo_t    packetInfo;
     RAIL_RxPacketDetails_t packetDetails;
-    uint16_t               length;
+    uint16_t               length            = 0;
     bool                   framePendingInAck = false;
     bool                   rxCorrupted       = false;
     uint8_t                iid               = 0;
@@ -2558,7 +2557,7 @@ static void packetReceivedCallback(RAIL_RxPacketHandle_t packetHandle)
 #endif
         sReceiveAckFrame.mLength = length;
 
-        // Releasing the ACK frames here, ensures that the main thread (processNextRxPacket)
+        // Releasing the ACK frames here, ensures that the main thread (processRxPackets)
         // is not wasting cycles, releasing the ACK frames from the Rx FIFO queue.
         RAIL_ReleaseRxPacket(gRailHandle, packetHandle);
 
@@ -3087,8 +3086,6 @@ static void updateRxFrameDetails(RAIL_RxPacketDetails_t *pPacketDetails,
                                  bool                    framePendingSetInOutgoingAck,
                                  uint8_t                 iid)
 {
-    OT_UNUSED_VARIABLE(iid);
-    OT_ASSERT(pPacketDetails != NULL);
 
     // Current time > sync-receive timestamp
     // Therefore lower 32 bits of current time should always be greater than lower 32 bits
@@ -3112,7 +3109,7 @@ static void updateRxFrameDetails(RAIL_RxPacketDetails_t *pPacketDetails,
             pPacketDetails->timeReceived.packetTime + ((uint64_t)railUsTimerWraps << 32);
 // TODO: Maybe remove #if ?
 #if OPENTHREAD_RADIO && OPENTHREAD_CONFIG_MULTIPAN_RCP_ENABLE == 1
-        sReceiveAckFrame.mIid                     = iid;
+        sReceiveAckFrame.mIid = iid;
 #endif
     }
     else
@@ -3126,7 +3123,7 @@ static void updateRxFrameDetails(RAIL_RxPacketDetails_t *pPacketDetails,
         // Set this flag only when the packet is really acknowledged with frame pending set.
         sReceiveFrame[sReceiveBufferInUse].mInfo.mRxInfo.mAckedWithFramePending = framePendingSetInOutgoingAck;
 #if OPENTHREAD_RADIO && OPENTHREAD_CONFIG_MULTIPAN_RCP_ENABLE == 1
-        sReceiveFrame.mIid                                 = iid;
+        sReceiveFrame.mIid = iid;
 #endif
 
 #if OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2