linux-kernel - [PATCH] staging: csr: use is_zero_ether

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Date:	Sat, 25 Aug 2012 09:39:15 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	gregkh@...uxfoundation.org
Cc:	yongjun_wei@...ndmicro.com.cn, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] staging: csr: use is_zero_ether_addr() instead of memcmp()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Using is_zero_ether_addr() instead of directly use
memcmp() to determine if the ethernet address is all
zeros.

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

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/staging/csr/sme_wext.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/csr/sme_wext.c b/drivers/staging/csr/sme_wext.c
index 7e85907..f09a738 100644
--- a/drivers/staging/csr/sme_wext.c
+++ b/drivers/staging/csr/sme_wext.c
@@ -1191,8 +1191,6 @@ unifi_siwap(struct net_device *dev, struct iw_request_info *info,
     netInterface_priv_t *interfacePriv = (netInterface_priv_t *)netdev_priv(dev);
     unifi_priv_t *priv = interfacePriv->privPtr;
     int err = 0;
-    const unsigned char zero_bssid[ETH_ALEN] = {0x00, 0x00, 0x00,
-        0x00, 0x00, 0x00};
 
     func_enter();
 
@@ -1213,7 +1211,7 @@ unifi_siwap(struct net_device *dev, struct iw_request_info *info,
 	unifi_trace(priv, UDBG1, "unifi_siwap: asked for %pM\n",
 		wrqu->ap_addr.sa_data);
 
-    if (!memcmp(wrqu->ap_addr.sa_data, zero_bssid, ETH_ALEN)) {
+    if (is_zero_ether_addr(wrqu->ap_addr.sa_data)) {
         priv->ignore_bssid_join = FALSE;
         err = sme_mgt_disconnect(priv);
         if (err) {


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