wireless: use is_broadcast_ether_addr() instead of memcmp()

Using is_broadcast_ether_addr() instead of directly use
memcmp() to determine if the ethernet address is broadcast
address.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/hostap/hostap_ioctl.c

@@ -6,6 +6,7 @@
 #include <linux/ethtool.h>
 #include <linux/if_arp.h>
 #include <linux/module.h>
+#include <linux/etherdevice.h>
 #include <net/lib80211.h>
 
 #include "hostap_wlan.h"
@@ -3221,8 +3222,7 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
 		return -EINVAL;
 
 	addr = ext->addr.sa_data;
-	if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff &&
-	    addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) {
+	if (is_broadcast_ether_addr(addr)) {
 		sta_ptr = NULL;
 		crypt = &local->crypt_info.crypt[i];
 	} else {
@@ -3394,8 +3394,7 @@ static int prism2_ioctl_giwencodeext(struct net_device *dev,
 		i--;
 
 	addr = ext->addr.sa_data;
-	if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff &&
-	    addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) {
+	if (is_broadcast_ether_addr(addr)) {
 		sta_ptr = NULL;
 		crypt = &local->crypt_info.crypt[i];
 	} else {
@@ -3458,9 +3457,7 @@ static int prism2_ioctl_set_encryption(local_info_t *local,
 	    param->u.crypt.key_len)
 		return -EINVAL;
 
-	if (param->sta_addr[0] == 0xff && param->sta_addr[1] == 0xff &&
-	    param->sta_addr[2] == 0xff && param->sta_addr[3] == 0xff &&
-	    param->sta_addr[4] == 0xff && param->sta_addr[5] == 0xff) {
+	if (is_broadcast_ether_addr(param->sta_addr)) {
 		if (param->u.crypt.idx >= WEP_KEYS)
 			return -EINVAL;
 		sta_ptr = NULL;
@@ -3593,9 +3590,7 @@ static int prism2_ioctl_get_encryption(local_info_t *local,
 	if (max_key_len < 0)
 		return -EINVAL;
 
-	if (param->sta_addr[0] == 0xff && param->sta_addr[1] == 0xff &&
-	    param->sta_addr[2] == 0xff && param->sta_addr[3] == 0xff &&
-	    param->sta_addr[4] == 0xff && param->sta_addr[5] == 0xff) {
+	if (is_broadcast_ether_addr(param->sta_addr)) {
 		sta_ptr = NULL;
 		if (param->u.crypt.idx >= WEP_KEYS)
 			param->u.crypt.idx = local->crypt_info.tx_keyidx;