From 4e0407b453d082747c088fb6e704c85476bbf212 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rapha=C3=ABl=20Beamonte?= Date: Sat, 5 Sep 2015 22:15:12 -0400 Subject: [PATCH] staging: rtl8192u: r8192U_core: fix use ether_addr_copy() over memcpy() code style issue MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2) The values used are stored as dev_addr in net_device (declared in include/linux/netdevice.h) and sa_data in sockaddr (declared in include/linux/socket.h). Both these elements are u16 aligned as shown by using pahole (position must be a multiple of sizeof(u16)): unsigned char * dev_addr; /* 888 8 */ char sa_data[14]; /* 2 14 */ It is thus safe to use ether_addr_copy() instead of memcpy() for that call, as it is already done in multiple files in the Linux kernel sources: drivers/net/ethernet/broadcom/genet/bcmgenet.c drivers/net/ethernet/brocade/bna/bnad.c drivers/net/ethernet/emulex/benet/be_main.c drivers/net/ethernet/ezchip/nps_enet.c drivers/net/ethernet/ibm/ibmveth.c drivers/net/ethernet/intel/fm10k/fm10k_netdev.c drivers/net/ethernet/intel/i40e/i40e_main.c drivers/net/ethernet/mellanox/mlx5/core/en_main.c drivers/net/usb/lan78xx.c net/8021q/vlan_dev.c net/batman-adv/soft-interface.c net/dsa/slave.c Signed-off-by: Raphaël Beamonte Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8192u/r8192U_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c index 76255cb09617..b143b36eb57d 100644 --- a/drivers/staging/rtl8192u/r8192U_core.c +++ b/drivers/staging/rtl8192u/r8192U_core.c @@ -3469,7 +3469,7 @@ static int r8192_set_mac_adr(struct net_device *dev, void *mac) down(&priv->wx_sem); - memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); + ether_addr_copy(dev->dev_addr, addr->sa_data); schedule_work(&priv->reset_wq); up(&priv->wx_sem); -- 2.30.2