return buf->duration_a;
                } else {
-                       // Auto Fallback
-                       PSTxDataHead_g_FB pBuf = (PSTxDataHead_g_FB)pTxDataHead;
+                       /* Auto Fallback */
+                       struct vnt_tx_datahead_g_fb *buf = pTxDataHead;
                        /* Get SignalField, ServiceField & Length */
                        vnt_get_phy_field(pDevice, cbFrameLength, wCurrentRate,
-                                         byPktType, &pBuf->a);
+                                         byPktType, &buf->a);
 
                        vnt_get_phy_field(pDevice, cbFrameLength,
                                          pDevice->byTopCCKBasicRate,
-                                         PK_TYPE_11B, &pBuf->b);
-                       //Get Duration and TimeStamp
-                       pBuf->wDuration_a = cpu_to_le16((unsigned short)s_uGetDataDuration(pDevice, DATADUR_A, cbFrameLength, byPktType,
-                                                                                          wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption)); //1: 2.4GHz
-                       pBuf->wDuration_b = cpu_to_le16((unsigned short)s_uGetDataDuration(pDevice, DATADUR_B, cbFrameLength, PK_TYPE_11B,
-                                                                                          pDevice->byTopCCKBasicRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption)); //1: 2.4GHz
-                       pBuf->wDuration_a_f0 = cpu_to_le16((unsigned short)s_uGetDataDuration(pDevice, DATADUR_A_F0, cbFrameLength, byPktType,
-                                                                                             wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption)); //1: 2.4GHz
-                       pBuf->wDuration_a_f1 = cpu_to_le16((unsigned short)s_uGetDataDuration(pDevice, DATADUR_A_F1, cbFrameLength, byPktType,
-                                                                                             wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption)); //1: 2.4GHz
-
-                       pBuf->wTimeStampOff_a = vnt_time_stamp_off(pDevice, wCurrentRate);
-                       pBuf->wTimeStampOff_b = vnt_time_stamp_off(pDevice, pDevice->byTopCCKBasicRate);
-
-                       return pBuf->wDuration_a;
+                                         PK_TYPE_11B, &buf->b);
+                       /* Get Duration and TimeStamp */
+                       buf->duration_a = cpu_to_le16((u16)s_uGetDataDuration(pDevice, DATADUR_A, cbFrameLength, byPktType,
+                                                                             wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption));
+                       buf->duration_b = cpu_to_le16((u16)s_uGetDataDuration(pDevice, DATADUR_B, cbFrameLength, PK_TYPE_11B,
+                                                                              pDevice->byTopCCKBasicRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption));
+                       buf->duration_a_f0 = cpu_to_le16((u16)s_uGetDataDuration(pDevice, DATADUR_A_F0, cbFrameLength, byPktType,
+                                                                                 wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption));
+                       buf->duration_a_f1 = cpu_to_le16((u16)s_uGetDataDuration(pDevice, DATADUR_A_F1, cbFrameLength, byPktType,
+                                                                                wCurrentRate, bNeedAck, uFragIdx, cbLastFragmentSize, uMACfragNum, byFBOption));
+
+                       buf->time_stamp_off_a = vnt_time_stamp_off(pDevice, wCurrentRate);
+                       buf->time_stamp_off_b = vnt_time_stamp_off(pDevice, pDevice->byTopCCKBasicRate);
+
+                       return buf->duration_a;
                } //if (byFBOption == AUTO_FB_NONE)
        } else if (byPktType == PK_TYPE_11A) {
                if ((byFBOption != AUTO_FB_NONE)) {
                                pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts));
                                pvRTS = (PSRTS_g_FB) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts) + cbMICHDR);
                                pvCTS = NULL;
-                               pvTxDataHd = (PSTxDataHead_g_FB) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts) + cbMICHDR + sizeof(SRTS_g_FB));
-                               cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_rts) + cbMICHDR + sizeof(SRTS_g_FB) + sizeof(STxDataHead_g_FB);
+                               pvTxDataHd = (void *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_rts) + cbMICHDR + sizeof(SRTS_g_FB));
+                               cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_rts) +
+                                       cbMICHDR + sizeof(SRTS_g_FB) + sizeof(struct vnt_tx_datahead_g_fb);
                        } else { //RTS_needless
                                pvRrvTime = (void *)(pbyTxBufferAddr + wTxBufSize);
                                pMICHDR = (struct vnt_mic_hdr *) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts));
                                pvRTS = NULL;
                                pvCTS = (PSCTS_FB) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts) + cbMICHDR);
-                               pvTxDataHd = (PSTxDataHead_g_FB) (pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts) + cbMICHDR + sizeof(SCTS_FB));
-                               cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_cts) + cbMICHDR + sizeof(SCTS_FB) + sizeof(STxDataHead_g_FB);
+                               pvTxDataHd = (void  *)(pbyTxBufferAddr + wTxBufSize + sizeof(struct vnt_rrv_time_cts) + cbMICHDR + sizeof(SCTS_FB));
+                               cbHeaderLength = wTxBufSize + sizeof(struct vnt_rrv_time_cts) +
+                                       cbMICHDR + sizeof(SCTS_FB) + sizeof(struct vnt_tx_datahead_g_fb);
                        }
                } // Auto Fall Back
        } else {//802.11a/b packet