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

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Message-Id: <1354670522-27144-1-git-send-email-tipecaml@gmail.com>
Date:	Wed,  5 Dec 2012 02:22:02 +0100
From:	Cyril Roelandt <tipecaml@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	kernel-janitors@...r.kernel.org, Larry.Finger@...inger.net,
	florian.c.schilhabel@...glemail.com, gregkh@...uxfoundation.org,
	yongjun_wei@...ndmicro.com.cn, jim.cromie@...il.com,
	marcos.souza.org@...il.com, devel@...verdev.osuosl.org,
	Cyril Roelandt <tipecaml@...il.com>
Subject: [PATCH] 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 |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
index 3a64790..2c73319 100644
--- a/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
+++ b/drivers/staging/rtl8712/rtl871x_ioctl_linux.c
@@ -1131,10 +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)) {
 		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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