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 <raphael.beamo...@gmail.com>
---
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 76255cb..b143b36 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);
--
2.5.1
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