stgaing: vt6655: remove unused variable wCTSDuration

wCTSDuration is always set to 0.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/device.h

@@ -476,7 +476,6 @@ struct vnt_private {
 	unsigned short wMaxTransmitMSDULifetime;
 	unsigned char abyBSSID[ETH_ALEN];
 	unsigned char abyDesireBSSID[ETH_ALEN];
-	unsigned short wCTSDuration;       // update while speed change
 	unsigned short wACKDuration;       // update while speed change
 	unsigned short wRTSTransmitLen;    // update while speed change
 	unsigned char byRTSServiceField;  // update while speed change

drivers/staging/vt6655/device_main.c

@@ -387,7 +387,6 @@ device_set_options(struct vnt_private *pDevice)
 	pDevice->byAutoFBCtrl = AUTO_FB_0;
 	pDevice->bUpdateBBVGA = true;
 	pDevice->byFOETuning = 0;
-	pDevice->wCTSDuration = 0;
 	pDevice->byPreambleType = 0;
 
 	pr_debug(" uChannel= %d\n", (int)pDevice->uChannel);

drivers/staging/vt6655/rxtx.c

@@ -1051,22 +1051,17 @@ s_vFillCTSHead(
 
 			buf->duration_ba = (u16)s_uGetRTSCTSDuration(pDevice, CTSDUR_BA, cbFrameLength,
 								     byPktType, wCurrentRate, bNeedAck, byFBOption);
-			buf->duration_ba += pDevice->wCTSDuration;
-
 			buf->duration_ba = cpu_to_le16(buf->duration_ba);
 			/* Get CTSDuration_ba_f0 */
 			buf->cts_duration_ba_f0 = (u16)s_uGetRTSCTSDuration(pDevice, CTSDUR_BA_F0, cbFrameLength,
 									    byPktType, wCurrentRate,
 									    bNeedAck, byFBOption);
 
-			buf->cts_duration_ba_f0 += pDevice->wCTSDuration;
-
 			buf->cts_duration_ba_f0 = cpu_to_le16(buf->cts_duration_ba_f0);
 			//Get CTSDuration_ba_f1
 			buf->cts_duration_ba_f1 = (u16)s_uGetRTSCTSDuration(pDevice, CTSDUR_BA_F1, cbFrameLength,
 									    byPktType, wCurrentRate,
 									    bNeedAck, byFBOption);
-			buf->cts_duration_ba_f1 += pDevice->wCTSDuration;
 
 			buf->cts_duration_ba_f1 = cpu_to_le16(buf->cts_duration_ba_f1);
 			/* Get CTS Frame body */
@@ -1091,7 +1086,7 @@ s_vFillCTSHead(
 				cpu_to_le16((u16)s_uGetRTSCTSDuration(pDevice, CTSDUR_BA, cbFrameLength,
 								      byPktType, wCurrentRate, bNeedAck,
 								      byFBOption));
-			buf->duration_ba += pDevice->wCTSDuration;
+
 			buf->duration_ba = cpu_to_le16(buf->duration_ba);
 
 			/* Get CTS Frame body */