staging: ks7010: simplify calls to memcpy()

Function uses overly complex calls to memcpy(). Code may be simplified
by the use of a local variable. Code sometimes uses explicit address
of initial array element and sometimes does not. Uniformity aids
readability. If array pointers are explicit it aids readability further.

Simplify calls to memcpy(). Add local pointer variable, define it to
the correct memory location. Use newly defined variable in calls to
memcpy(). Be uniform in use of explicit address of first element of
array (&foo[0]).

Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks_wlan_net.c

@@ -1769,6 +1769,7 @@ static int ks_wlan_set_encode_ext(struct net_device *dev,
 	struct iw_encode_ext *enc;
 	int index = dwrq->flags & IW_ENCODE_INDEX;
 	unsigned int commit = 0;
+	struct wpa_key_t *key;
 
 	enc = (struct iw_encode_ext *)extra;
 	if (!enc)
@@ -1784,6 +1785,7 @@ static int ks_wlan_set_encode_ext(struct net_device *dev,
 	if (index < 1 || index > 4)
 		return -EINVAL;
 	index--;
+	key = &priv->wpa.key[index];
 
 	if (dwrq->flags & IW_ENCODE_DISABLED)
 		priv->wpa.key[index].key_len = 0;
@@ -1793,12 +1795,10 @@ static int ks_wlan_set_encode_ext(struct net_device *dev,
 		priv->wpa.txkey = index;
 		commit |= SME_WEP_INDEX;
 	} else if (enc->ext_flags & IW_ENCODE_EXT_RX_SEQ_VALID) {
-		memcpy(&priv->wpa.key[index].rx_seq[0],
-		       enc->rx_seq, IW_ENCODE_SEQ_MAX_SIZE);
+		memcpy(&key->rx_seq[0], &enc->rx_seq[0], IW_ENCODE_SEQ_MAX_SIZE);
 	}
 
-	memcpy(&priv->wpa.key[index].addr.sa_data[0],
-	       &enc->addr.sa_data[0], ETH_ALEN);
+	memcpy(&key->addr.sa_data[0], &enc->addr.sa_data[0], ETH_ALEN);
 
 	switch (enc->alg) {
 	case IW_ENCODE_ALG_NONE:
@@ -1816,9 +1816,8 @@ static int ks_wlan_set_encode_ext(struct net_device *dev,
 			commit |= SME_WEP_FLAG;
 		}
 		if (enc->key_len) {
-			memcpy(&priv->wpa.key[index].key_val[0],
-			       &enc->key[0], enc->key_len);
-			priv->wpa.key[index].key_len = enc->key_len;
+			memcpy(&key->key_val[0], &enc->key[0], enc->key_len);
+			key->key_len = enc->key_len;
 			commit |= (SME_WEP_VAL1 << index);
 		}
 		break;
@@ -1828,20 +1827,14 @@ static int ks_wlan_set_encode_ext(struct net_device *dev,
 			commit |= SME_WEP_FLAG;
 		}
 		if (enc->key_len == 32) {
-			memcpy(&priv->wpa.key[index].key_val[0],
-			       &enc->key[0], enc->key_len - 16);
-			priv->wpa.key[index].key_len =
-				enc->key_len - 16;
+			memcpy(&key->key_val[0], &enc->key[0], enc->key_len - 16);
+			key->key_len = enc->key_len - 16;
 			if (priv->wpa.key_mgmt_suite == 4) {	/* WPA_NONE */
-				memcpy(&priv->wpa.key[index].
-				       tx_mic_key[0], &enc->key[16], 8);
-				memcpy(&priv->wpa.key[index].
-				       rx_mic_key[0], &enc->key[16], 8);
+				memcpy(&key->tx_mic_key[0], &enc->key[16], 8);
+				memcpy(&key->rx_mic_key[0], &enc->key[16], 8);
 			} else {
-				memcpy(&priv->wpa.key[index].
-				       tx_mic_key[0], &enc->key[16], 8);
-				memcpy(&priv->wpa.key[index].
-				       rx_mic_key[0], &enc->key[24], 8);
+				memcpy(&key->tx_mic_key[0], &enc->key[16], 8);
+				memcpy(&key->rx_mic_key[0], &enc->key[24], 8);
 			}
 			commit |= (SME_WEP_VAL1 << index);
 		}