Staging: drop redundant memset

The region set by the call to memset is immediately overwritten by the
subsequent call to memcpy.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e1,e2,e3,e4;
@@

- memset(e1,e2,e3);
  memcpy(e1,e4,e3);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rt2860/sta/assoc.c

@@ -1596,7 +1596,6 @@ BOOLEAN StaAddMacTableEntry(struct rt_rtmp_adapter *pAd,
 		union iwreq_data wrqu;
 		wext_notify_event_assoc(pAd);
 
-		memset(wrqu.ap_addr.sa_data, 0, MAC_ADDR_LEN);
 		memcpy(wrqu.ap_addr.sa_data, pAd->MlmeAux.Bssid, MAC_ADDR_LEN);
 		wireless_send_event(pAd->net_dev, SIOCGIWAP, &wrqu, NULL);
 

drivers/staging/rt2860/sta_ioctl.c

@@ -608,7 +608,6 @@ int rt_ioctl_siwap(struct net_device *dev,
 	/* Prevent to connect AP again in STAMlmePeriodicExec */
 	pAdapter->MlmeAux.AutoReconnectSsidLen = 32;
 
-	memset(Bssid, 0, MAC_ADDR_LEN);
 	memcpy(Bssid, ap_addr->sa_data, MAC_ADDR_LEN);
 	MlmeEnqueue(pAdapter,
 		    MLME_CNTL_STATE_MACHINE,

drivers/staging/rtl8192su/r819xU_cmdpkt.c

@@ -33,7 +33,6 @@ bool SendTxCommandPacket(struct net_device *dev, void *pData, u32 DataLen)
 	tcb_desc->bLastIniPkt = 0;
 	skb_reserve(skb, USB_HWDESC_HEADER_LEN);
 	ptr_buf = skb_put(skb, DataLen);
-	memset(ptr_buf, 0, DataLen);
 	memcpy(ptr_buf, pData, DataLen);
 	tcb_desc->txbuf_size = (u16)DataLen;
 

drivers/staging/rtl8192u/r819xU_cmdpkt.c

@@ -63,7 +63,6 @@ SendTxCommandPacket(
 	tcb_desc->bLastIniPkt = 0;
 	skb_reserve(skb, USB_HWDESC_HEADER_LEN);
 	ptr_buf = skb_put(skb, DataLen);
-	memset(ptr_buf,0,DataLen);
 	memcpy(ptr_buf,pData,DataLen);
 	tcb_desc->txbuf_size= (u16)DataLen;
 

drivers/staging/vt6655/iwctl.c

@@ -699,7 +699,6 @@ if (pMgmt->eScanState ==  WMAC_IS_SCANNING) {
 	if (wrq->sa_family != ARPHRD_ETHER)
 		rc = -EINVAL;
 	else {
-		memset(pMgmt->abyDesireBSSID, 0xFF, 6);
 		memcpy(pMgmt->abyDesireBSSID, wrq->sa_data, 6);
 		                //2008-0409-05, <Add> by Einsn Liu
 		if((pDevice->bLinkPass == TRUE) &&
@@ -889,7 +888,6 @@ if (pMgmt->eScanState ==  WMAC_IS_SCANNING) {
            BYTE                   abyTmpDesireSSID[WLAN_IEHDR_LEN + WLAN_SSID_MAXLEN + 1];
 	  UINT            ii , uSameBssidNum=0;
 
-	  memset(abyTmpDesireSSID,0,sizeof(abyTmpDesireSSID));
 	  memcpy(abyTmpDesireSSID,pMgmt->abyDesireSSID,sizeof(abyTmpDesireSSID));
             pCurr = BSSpSearchBSSList(pDevice,
                                       NULL,

drivers/staging/vt6656/iwctl.c

@@ -758,7 +758,6 @@ int iwctl_siwap(struct net_device *dev,
 	if (wrq->sa_family != ARPHRD_ETHER)
 		rc = -EINVAL;
 	else {
-		memset(pMgmt->abyDesireBSSID, 0xFF, 6);
 		memcpy(pMgmt->abyDesireBSSID, wrq->sa_data, 6);
 
 	//mike :add
@@ -936,7 +935,6 @@ int iwctl_siwessid(struct net_device *dev,
            BYTE                   abyTmpDesireSSID[WLAN_IEHDR_LEN + WLAN_SSID_MAXLEN + 1];
 	  UINT            ii , uSameBssidNum=0;
 
-	  memset(abyTmpDesireSSID,0,sizeof(abyTmpDesireSSID));
 	  memcpy(abyTmpDesireSSID,pMgmt->abyDesireSSID,sizeof(abyTmpDesireSSID));
             pCurr = BSSpSearchBSSList(pDevice,
                                       NULL,