linux-kernel - [PATCH v3] staging: rtl8712: Use ether_addr

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Message-Id: <1431966765-10259-1-git-send-email-jteki@openedev.com>
Date:	Mon, 18 May 2015 22:02:45 +0530
From:	Jagan Teki <jteki@...nedev.com>
To:	linux-kernel@...r.kernel.org
Cc:	devel@...verdev.osuosl.org,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Jagan Teki <jteki@...nedev.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Larry Finger <Larry.Finger@...inger.net>,
	Florian Schilhabel <florian.c.schilhabel@...glemail.com>
Subject: [PATCH v3] staging: rtl8712: Use ether_addr_copy() instead of memcpy()

Fixes Warning encounter this by applying checkpatch.pl against this file:
Prefer ether_addr_copy() over memcpy() if the Ethernet addresses
are __aligned(2)

pahole output for respective structures:
- addr->sa_data
struct sockaddr {
	sa_family_t                sa_family;            /*     0     2 */
	char                       sa_data[14];          /*     2    14 */

	/* size: 16, cachelines: 1, members: 2 */
	/* last cacheline: 16 bytes */
};

- pnetdev->dev_addr
dev_addr is interface address infor from generic net_device structure
which is properly aligned and have some patches with this change as well.
"staging: rtl8712: fix Prefer ether_addr_copy() over memcpy()"
(sha1: 36e4d8826b317080e283e4edd08bf8d5ac706f38)

Signed-off-by: Jagan Teki <jteki@...nedev.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Larry Finger <Larry.Finger@...inger.net>
Cc: Florian Schilhabel <florian.c.schilhabel@...glemail.com>
---
Changes for v3:
	- Removed unaligned conversions
Changes for v2:
	- Describe a changelog, to prove address are aligned

 drivers/staging/rtl8712/os_intfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8712/os_intfs.c b/drivers/staging/rtl8712/os_intfs.c
index 6e776e5..d5f4c4d 100644
--- a/drivers/staging/rtl8712/os_intfs.c
+++ b/drivers/staging/rtl8712/os_intfs.c
@@ -181,7 +181,7 @@ static int r871x_net_set_mac_address(struct net_device *pnetdev, void *p)
 	struct sockaddr *addr = p;
 
 	if (padapter->bup == false)
-		memcpy(pnetdev->dev_addr, addr->sa_data, ETH_ALEN);
+		ether_addr_copy(pnetdev->dev_addr, addr->sa_data);
 	return 0;
 }
 
-- 
1.9.1

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