linux-kernel - [PATCH v2] staging: rtl8712: avoid a useless call to memset().

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Date:	Tue, 11 Dec 2012 01:20:48 +0100
From:	Cyril Roelandt <tipecaml@...il.com>
To:	dan.carpenter@...cle.com
Cc:	Larry.Finger@...inger.net, florian.c.schilhabel@...glemail.com,
	gregkh@...uxfoundation.org, yongjun_wei@...ndmicro.com.cn,
	marcos.souza.org@...il.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
	Cyril Roelandt <tipecaml@...il.com>
Subject: [PATCH v2] staging: rtl8712: avoid a useless call to memset().

In r8711_wx_get_wap(), make sure we do not call memcpy() on a memory area that
has just been zeroed by a call to memset().

Signed-off-by: Cyril Roelandt <tipecaml@...il.com>
---
 drivers/staging/rtl8712/rtl871x_ioctl_linux.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
index 3a64790..72c51b3 100644
--- a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
+++ b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
@@ -1131,11 +1131,11 @@ static int r8711_wx_get_wap(struct net_device *dev,
 	struct ndis_wlan_bssid_ex *pcur_bss = &pmlmepriv->cur_network.network;
 
 	wrqu->ap_addr.sa_family = ARPHRD_ETHER;
-	memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);
-	if (check_fwstate(pmlmepriv, _FW_LINKED |
-	    WIFI_ADHOC_MASTER_STATE|WIFI_AP_STATE)) {
+	if (check_fwstate(pmlmepriv, _FW_LINKED | WIFI_ADHOC_MASTER_STATE |
+				     WIFI_AP_STATE))
 		memcpy(wrqu->ap_addr.sa_data, pcur_bss->MacAddress, ETH_ALEN);
-	}
+	else
+		memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);
 	return 0;
 }
 
-- 
1.7.10.4

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