Patchwork wimax/i2400m: use is_zero_ether_addr() instead of memcmp()

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Submitter Wei Yongjun
Date Aug. 23, 2012, 6:49 a.m.
Message ID <CAPgLHd9_MkQcGbQEqf=6Kjm06juybu29qSBdd7T=_EenFDyuEQ@mail.gmail.com>
Download mbox | patch
Permalink /patch/179519/
State Accepted
Delegated to: David Miller
Headers show

Comments

Wei Yongjun - Aug. 23, 2012, 6:49 a.m.
From: Wei Yongjun <yongjun_wei@trendmicro.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@trendmicro.com.cn>
---
 drivers/net/wimax/i2400m/driver.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)



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David Miller - Aug. 24, 2012, 5:30 p.m.
From: Wei Yongjun <weiyj.lk@gmail.com>
Date: Thu, 23 Aug 2012 14:49:33 +0800

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

Applied.
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Patch

diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c
index 0254261..9c34d2f 100644
--- a/drivers/net/wimax/i2400m/driver.c
+++ b/drivers/net/wimax/i2400m/driver.c
@@ -222,7 +222,6 @@  int i2400m_check_mac_addr(struct i2400m *i2400m)
 	struct sk_buff *skb;
 	const struct i2400m_tlv_detailed_device_info *ddi;
 	struct net_device *net_dev = i2400m->wimax_dev.net_dev;
-	const unsigned char zeromac[ETH_ALEN] = { 0 };
 
 	d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
 	skb = i2400m_get_device_info(i2400m);
@@ -244,7 +243,7 @@  int i2400m_check_mac_addr(struct i2400m *i2400m)
 		 "to that of boot mode's\n");
 	dev_warn(dev, "device reports     %pM\n", ddi->mac_address);
 	dev_warn(dev, "boot mode reported %pM\n", net_dev->perm_addr);
-	if (!memcmp(zeromac, ddi->mac_address, sizeof(zeromac)))
+	if (is_zero_ether_addr(ddi->mac_address))
 		dev_err(dev, "device reports an invalid MAC address, "
 			"not updating\n");
 	else {