linux-kernel - [PATCH 2/2] net: spider_net: avoid using signed char for bitops

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Message-Id: <1412348517-20352-4-git-send-email-antoine.tenart@free-electrons.com>
Date:	Fri,  3 Oct 2014 17:01:56 +0200
From:	Antoine Tenart <antoine.tenart@...e-electrons.com>
To:	dan.carpenter@...cle.com, kou.ishizaki@...hiba.co.jp,
	jens@...ibm.com
Cc:	Antoine Tenart <antoine.tenart@...e-electrons.com>,
	netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] net: spider_net: avoid using signed char for bitops

Signedness bugs may occur when using signed char for bitops,
depending on if the highest bit is ever used.

Signed-off-by: Antoine Tenart <antoine.tenart@...e-electrons.com>
---
 drivers/net/ethernet/toshiba/spider_net.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/toshiba/spider_net.c b/drivers/net/ethernet/toshiba/spider_net.c
index 713313e15c68..8e9371a3388a 100644
--- a/drivers/net/ethernet/toshiba/spider_net.c
+++ b/drivers/net/ethernet/toshiba/spider_net.c
@@ -1325,9 +1325,9 @@ spider_net_set_mac(struct net_device *netdev, void *p)
 	spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
 
 	/* write mac */
-	macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
-		(addr->sa_data[2]<<8) + (addr->sa_data[3]);
-	macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
+	macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) +
+		(netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]);
+	macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]);
 	spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
 	spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
 
-- 
1.9.1

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