return buf->duration_a;
                } /* if (byFBOption == AUTO_FB_NONE) */
        } else if (byPktType == PK_TYPE_11A) {
-               if ((byFBOption != AUTO_FB_NONE)) {
+               if (byFBOption != AUTO_FB_NONE) {
                        /* Auto Fallback */
                        struct vnt_tx_datahead_a_fb *buf = pTxDataHead;
                        /* Get SignalField, ServiceField & Length */
                        buf->rrv_time = vnt_rxtx_rsvtime_le16(pDevice, PK_TYPE_11A, cbFrameSize, wCurrentRate, bNeedACK);
                }
        } else if (byPktType == PK_TYPE_11B) {
-               if ((pvRTS != NULL)) {/* RTS_need, non PCF mode */
+               if (pvRTS != NULL) {/* RTS_need, non PCF mode */
                        struct vnt_rrv_time_ab *buf = pvRrvTime;
 
                        buf->rts_rrv_time = s_uGetRTSCTSRsvTime(pDevice, 0, byPktType, cbFrameSize, wCurrentRate);