staging: vt6656: vnt_beacon_buffer attach mac header.

Attach ieee80211_hdr to vnt_beacon_buffer and remove pointer arithmetic.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/rxtx.c

@@ -1650,7 +1650,6 @@ CMD_STATUS csBeacon_xmit(struct vnt_private *pDevice,
 	u16 wCurrentRate;
 	u32 cbFrameBodySize;
 	u32 cbReqCount;
-	u8 *pbyTxBufferAddr;
 	struct vnt_usb_send_context *pContext;
 	CMD_STATUS status;
 
@@ -1663,7 +1662,6 @@ CMD_STATUS csBeacon_xmit(struct vnt_private *pDevice,
 
 	pTX_Buffer = (struct vnt_beacon_buffer *)&pContext->Data[0];
 	short_head = &pTX_Buffer->short_head;
-	pbyTxBufferAddr = (u8 *)&short_head->fifo_ctl;
 
     cbFrameBodySize = pPacket->cbPayloadLen;
 
@@ -1697,13 +1695,14 @@ CMD_STATUS csBeacon_xmit(struct vnt_private *pDevice,
 	}
 
 
-    //Generate Beacon Header
-    pMACHeader = (struct ieee80211_hdr *)(pbyTxBufferAddr + cbHeaderSize);
+	/* Generate Beacon Header */
+	pMACHeader = &pTX_Buffer->hdr;
+
 	memcpy(pMACHeader, pPacket->p80211Header, pPacket->cbMPDULen);
 
 	pMACHeader->duration_id = 0;
 	pMACHeader->seq_ctrl = cpu_to_le16(pDevice->wSeqCounter << 4);
-    pDevice->wSeqCounter++ ;
+	pDevice->wSeqCounter++;
 	if (pDevice->wSeqCounter > 0x0fff)
 		pDevice->wSeqCounter = 0;
 

drivers/staging/vt6656/rxtx.h

@@ -243,6 +243,7 @@ struct vnt_beacon_buffer {
 	u8 byPKTNO;
 	u16 wTxByteCount;
 	struct vnt_tx_short_buf_head short_head;
+	struct ieee80211_hdr hdr;
 } __packed;
 
 void vDMA0_tx_80211(struct vnt_private *, struct sk_buff *skb);