diff --git a/drivers/staging/vt6655/rxtx.c b/drivers/staging/vt6655/rxtx.c
index a49d8c38a4bd..72bb49c064c7 100644
--- a/drivers/staging/vt6655/rxtx.c
+++ b/drivers/staging/vt6655/rxtx.c
@@ -243,11 +243,16 @@ s_uGetDataDuration(
 )
 {
 	bool bLastFrag = false;
-	unsigned int uAckTime = 0, uNextPktTime = 0;
+	unsigned int uAckTime = 0, uNextPktTime = 0, len;
 
 	if (uFragIdx == (uMACfragNum - 1))
 		bLastFrag = true;
 
+	if (uFragIdx == (uMACfragNum - 2))
+		len = cbLastFragmentSize;
+	else
+		len = cbFrameLength;
+
 	switch (byDurType) {
 	case DATADUR_B:    /* DATADUR_B */
 		if (((uMACfragNum == 1)) || bLastFrag) {/* Non Frag or Last Frag */
@@ -258,10 +263,7 @@ s_uGetDataDuration(
 				return 0;
 			}
 		} else {/* First Frag or Mid Frag */
-			if (uFragIdx == (uMACfragNum - 2))
-				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wRate, bNeedAck);
-			else
-				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wRate, bNeedAck);
+			uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, len, wRate, bNeedAck);
 
 			if (bNeedAck)
 				uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopCCKBasicRate);
@@ -278,10 +280,7 @@ s_uGetDataDuration(
 				return 0;
 			}
 		} else {/* First Frag or Mid Frag */
-			if (uFragIdx == (uMACfragNum - 2))
-				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wRate, bNeedAck);
-			else
-				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wRate, bNeedAck);
+			uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, len, wRate, bNeedAck);
 
 			if (bNeedAck)
 				uAckTime = BBuGetFrameTime(pDevice->byPreambleType, byPktType, 14, pDevice->byTopOFDMBasicRate);
@@ -304,16 +303,9 @@ s_uGetDataDuration(
 				wRate = RATE_54M;
 
 			if (byFBOption == AUTO_FB_0) {
-				if (uFragIdx == (uMACfragNum - 2))
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
-				else
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
-
-			} else { /* (byFBOption == AUTO_FB_1) */
-				if (uFragIdx == (uMACfragNum - 2))
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
-				else
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
+				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, len, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
+			} else {
+				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, len, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
 			}
 
 			if (bNeedAck)
@@ -337,16 +329,9 @@ s_uGetDataDuration(
 				wRate = RATE_54M;
 
 			if (byFBOption == AUTO_FB_0) {
-				if (uFragIdx == (uMACfragNum - 2))
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt0[FB_RATE1][wRate-RATE_18M], bNeedAck);
-				else
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt0[FB_RATE1][wRate-RATE_18M], bNeedAck);
-
-			} else { /* (byFBOption == AUTO_FB_1) */
-				if (uFragIdx == (uMACfragNum - 2))
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbLastFragmentSize, wFB_Opt1[FB_RATE1][wRate-RATE_18M], bNeedAck);
-				else
-					uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, cbFrameLength, wFB_Opt1[FB_RATE1][wRate-RATE_18M], bNeedAck);
+				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, len, wFB_Opt0[FB_RATE0][wRate-RATE_18M], bNeedAck);
+			} else {
+				uNextPktTime = s_uGetTxRsvTime(pDevice, byPktType, len, wFB_Opt1[FB_RATE0][wRate-RATE_18M], bNeedAck);
 			}
 
 			if (bNeedAck)