staging: vt6656: rxtx.c s_vFillRTSHead Parse out struct vnt_rts_g to new functions.

Parse out vnt_rts_g code to new function vnt_rxtx_rts_g_head.

Also create a new common calling function vnt_fill_ieee80211_rts
to fill the ieee80211_rts structure.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/rxtx.c

@@ -595,6 +595,50 @@ static u32 s_uFillDataHead(struct vnt_private *pDevice,
     return 0;
 }
 
+static int vnt_fill_ieee80211_rts(struct vnt_private *priv,
+	struct ieee80211_rts *rts, struct ethhdr *eth_hdr,
+		u16 duration)
+{
+	rts->duration = duration;
+	rts->frame_control = TYPE_CTL_RTS;
+
+	if (priv->eOPMode == OP_MODE_ADHOC || priv->eOPMode == OP_MODE_AP)
+		memcpy(rts->ra, eth_hdr->h_dest, ETH_ALEN);
+	else
+		memcpy(rts->ra, priv->abyBSSID, ETH_ALEN);
+
+	if (priv->eOPMode == OP_MODE_AP)
+		memcpy(rts->ta, priv->abyBSSID, ETH_ALEN);
+	else
+		memcpy(rts->ta, eth_hdr->h_source, ETH_ALEN);
+
+	return 0;
+}
+
+static int vnt_rxtx_rts_g_head(struct vnt_private *priv,
+	struct vnt_rts_g *buf, struct ethhdr *eth_hdr,
+	u8 pkt_type, u32 frame_len, int need_ack,
+	u16 current_rate, u8 fb_option)
+{
+	u16 rts_frame_len = 20;
+
+	BBvCalculateParameter(priv, rts_frame_len, priv->byTopCCKBasicRate,
+		PK_TYPE_11B, &buf->b);
+	BBvCalculateParameter(priv, rts_frame_len,
+		priv->byTopOFDMBasicRate, pkt_type, &buf->a);
+
+	buf->wDuration_bb = s_uGetRTSCTSDuration(priv, RTSDUR_BB, frame_len,
+		PK_TYPE_11B, priv->byTopCCKBasicRate, need_ack, fb_option);
+	buf->wDuration_aa = s_uGetRTSCTSDuration(priv, RTSDUR_AA, frame_len,
+		pkt_type, current_rate, need_ack, fb_option);
+	buf->wDuration_ba = s_uGetRTSCTSDuration(priv, RTSDUR_BA, frame_len,
+		pkt_type, current_rate, need_ack, fb_option);
+
+	vnt_fill_ieee80211_rts(priv, &buf->data, eth_hdr, buf->wDuration_aa);
+
+	return 0;
+}
+
 static void s_vFillRTSHead(struct vnt_private *pDevice, u8 byPktType,
 	void *pvRTS, u32 cbFrameLength, int bNeedAck,
 	struct ethhdr *psEthHeader, u16 wCurrentRate, u8 byFBOption)
@@ -609,35 +653,10 @@ static void s_vFillRTSHead(struct vnt_private *pDevice, u8 byPktType,
     if (byPktType == PK_TYPE_11GB || byPktType == PK_TYPE_11GA) {
         if (byFBOption == AUTO_FB_NONE) {
 		struct vnt_rts_g *pBuf = (struct vnt_rts_g *)pvRTS;
-            //Get SignalField,ServiceField,Length
-		BBvCalculateParameter(pDevice, uRTSFrameLen,
-			pDevice->byTopCCKBasicRate, PK_TYPE_11B, &pBuf->b);
-		BBvCalculateParameter(pDevice, uRTSFrameLen,
-			pDevice->byTopOFDMBasicRate, byPktType, &pBuf->a);
-            //Get Duration
-		pBuf->wDuration_bb = s_uGetRTSCTSDuration(pDevice, RTSDUR_BB,
-			cbFrameLength, PK_TYPE_11B,
-			pDevice->byTopCCKBasicRate, bNeedAck, byFBOption);
-		pBuf->wDuration_aa = s_uGetRTSCTSDuration(pDevice, RTSDUR_AA,
-			cbFrameLength, byPktType,
-			wCurrentRate, bNeedAck, byFBOption);
-		pBuf->wDuration_ba = s_uGetRTSCTSDuration(pDevice, RTSDUR_BA,
-			cbFrameLength, byPktType,
-			wCurrentRate, bNeedAck, byFBOption);
-		pBuf->data.duration = pBuf->wDuration_aa;
-		/*Get RTS Frame body */
-		pBuf->data.frame_control = TYPE_CTL_RTS;
 
-		if (pDevice->eOPMode == OP_MODE_ADHOC ||
-				pDevice->eOPMode == OP_MODE_AP)
-			memcpy(pBuf->data.ra, psEthHeader->h_dest, ETH_ALEN);
-		else
-			memcpy(pBuf->data.ra, pDevice->abyBSSID, ETH_ALEN);
-
-		if (pDevice->eOPMode == OP_MODE_AP)
-			memcpy(pBuf->data.ta, pDevice->abyBSSID, ETH_ALEN);
-		else
-			memcpy(pBuf->data.ta, psEthHeader->h_source, ETH_ALEN);
+		vnt_rxtx_rts_g_head(pDevice, pBuf,
+				psEthHeader, byPktType, cbFrameLength,
+				bNeedAck, wCurrentRate, byFBOption);
         }
         else {
 		struct vnt_rts_g_fb *pBuf = (struct vnt_rts_g_fb *)pvRTS;