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Subject[PATCH 1/2] staging: rtl8188eu: refactor rtw_macaddr_cfg()
Date
Use ether_addr_copy() instead of memcpy() to copy the mac address.

Using is_broadcast_ether_addr() and is_zero_ether_addr() instead of
testing each byte of the mac[] array for 0xff and 0x00 shortens the
code and improves readability.

Instead of a fixed default mac address use a random one to reduce the
likelihood of mac address collision.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
---
.../staging/rtl8188eu/core/rtw_ieee80211.c | 20 +++++--------------
1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_ieee80211.c b/drivers/staging/rtl8188eu/core/rtw_ieee80211.c
index 711ebb0ad640..e6dff44e00fd 100644
--- a/drivers/staging/rtl8188eu/core/rtw_ieee80211.c
+++ b/drivers/staging/rtl8188eu/core/rtw_ieee80211.c
@@ -917,25 +917,15 @@ void rtw_macaddr_cfg(u8 *mac_addr)

if (rtw_initmac && mac_pton(rtw_initmac, mac)) {
/* Users specify the mac address */
- memcpy(mac_addr, mac, ETH_ALEN);
+ ether_addr_copy(mac_addr, mac);
} else {
/* Use the mac address stored in the Efuse */
- memcpy(mac, mac_addr, ETH_ALEN);
+ ether_addr_copy(mac, mac_addr);
}

- if (((mac[0] == 0xff) && (mac[1] == 0xff) && (mac[2] == 0xff) &&
- (mac[3] == 0xff) && (mac[4] == 0xff) && (mac[5] == 0xff)) ||
- ((mac[0] == 0x0) && (mac[1] == 0x0) && (mac[2] == 0x0) &&
- (mac[3] == 0x0) && (mac[4] == 0x0) && (mac[5] == 0x0))) {
- mac[0] = 0x00;
- mac[1] = 0xe0;
- mac[2] = 0x4c;
- mac[3] = 0x87;
- mac[4] = 0x00;
- mac[5] = 0x00;
- /* use default mac address */
- memcpy(mac_addr, mac, ETH_ALEN);
- DBG_88E("MAC Address from efuse error, assign default one !!!\n");
+ if (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac)) {
+ eth_random_addr(mac_addr);
+ DBG_88E("MAC Address from efuse error, assign random one !!!\n");
}

DBG_88E("%s MAC Address = %pM\n", __func__, (mac_addr));
--
2.18.0
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