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[89.14.57.49]) by smtp.gmail.com with ESMTPSA id l78-v6sm15368283wmb.39.2018.06.25.08.13.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 25 Jun 2018 08:13:05 -0700 (PDT) From: Michael Straube To: gregkh@linuxfoundation.org Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, joe@perches.com, dan.carpenter@oracle.com, andy.shevchenko@gmail.com, Michael Straube Subject: [PATCH v2 2/4] staging: rtl8723bs: refactor rtw_macaddr_cfg() Date: Mon, 25 Jun 2018 17:12:36 +0200 Message-Id: <20180625151238.23147-2-straube.linux@gmail.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180625151238.23147-1-straube.linux@gmail.com> References: <20180625151238.23147-1-straube.linux@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. If np == NULL, of_get_property() returns NULL, hence the "np" check is not needed. Instead of a fixed default mac address use a random one to reduce the likelihood of mac address collision. Thanks to Joe Perches and Dan Carpenter. Signed-off-by: Michael Straube --- .../staging/rtl8723bs/core/rtw_ieee80211.c | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-) diff --git a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c index e55895632921..7aa00d1391f7 100644 --- a/drivers/staging/rtl8723bs/core/rtw_ieee80211.c +++ b/drivers/staging/rtl8723bs/core/rtw_ieee80211.c @@ -1177,24 +1177,13 @@ void rtw_macaddr_cfg(struct device *dev, u8 *mac_addr) memcpy(mac, mac_addr, ETH_ALEN); } - if (((mac[0] == 0xff) && (mac[1] == 0xff) && (mac[2] == 0xff) && - (mac[3] == 0xff) && (mac[4] == 0xff) && (mac[5] == 0xff)) || - ((mac[0] == 0x00) && (mac[1] == 0x00) && (mac[2] == 0x00) && - (mac[3] == 0x00) && (mac[4] == 0x00) && (mac[5] == 0x00))) { - if (np && - (addr = of_get_property(np, "local-mac-address", &len)) && + if (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac)) { + if ((addr = of_get_property(np, "local-mac-address", &len)) && len == ETH_ALEN) { memcpy(mac_addr, addr, ETH_ALEN); } else { - mac[0] = 0x00; - mac[1] = 0xe0; - mac[2] = 0x4c; - mac[3] = 0x87; - mac[4] = 0x00; - mac[5] = 0x00; - /* use default mac addresss */ - memcpy(mac_addr, mac, ETH_ALEN); - DBG_871X("MAC Address from efuse error, assign default one !!!\n"); + eth_random_addr(mac_addr); + DBG_871X("MAC Address from efuse error, assign random one !!!\n"); } } -- 2.18.0