Subject: [PATCH v2] FIRMWARE: bcm47xx_nvram: Replace mac address parsing

From: Andy Shevchenko <[email-masked]>
Date: Thu, 21 Dec 2017 16:40:55 +0200

Replace sscanf() with mac_pton().

Signed-off-by: Andy Shevchenko <[email-masked]>
---
- use negative condition to be consistent with the rest code
 drivers/firmware/broadcom/Kconfig         |  1 +
 drivers/firmware/broadcom/bcm47xx_sprom.c | 18 +++---------------
 2 files changed, 4 insertions(+), 15 deletions(-)

diff --git a/drivers/firmware/broadcom/Kconfig b/drivers/firmware/broadcom/Kconfig
index 5e29f83e7b39..c041dcb7ea52 100644
--- a/drivers/firmware/broadcom/Kconfig
+++ b/drivers/firmware/broadcom/Kconfig
@@ -13,6 +13,7 @@ config BCM47XX_NVRAM
 config BCM47XX_SPROM
 	bool "Broadcom SPROM driver"
 	depends on BCM47XX_NVRAM
+	select GENERIC_NET_UTILS
 	help
 	  Broadcom devices store configuration data in SPROM. Accessing it is
 	  specific to the bus host type, e.g. PCI(e) devices have it mapped in
diff --git a/drivers/firmware/broadcom/bcm47xx_sprom.c b/drivers/firmware/broadcom/bcm47xx_sprom.c
index 62aa3cf09b4d..4787f86c8ac1 100644
--- a/drivers/firmware/broadcom/bcm47xx_sprom.c
+++ b/drivers/firmware/broadcom/bcm47xx_sprom.c
@@ -137,20 +137,6 @@ static void nvram_read_leddc(const char *prefix, const char *name,
 	*leddc_off_time = (val >> 16) & 0xff;
 }
 
-static void bcm47xx_nvram_parse_macaddr(char *buf, u8 macaddr[6])
-{
-	if (strchr(buf, ':'))
-		sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &macaddr[0],
-			&macaddr[1], &macaddr[2], &macaddr[3], &macaddr[4],
-			&macaddr[5]);
-	else if (strchr(buf, '-'))
-		sscanf(buf, "%hhx-%hhx-%hhx-%hhx-%hhx-%hhx", &macaddr[0],
-			&macaddr[1], &macaddr[2], &macaddr[3], &macaddr[4],
-			&macaddr[5]);
-	else
-		pr_warn("Can not parse mac address: %s\n", buf);
-}
-
 static void nvram_read_macaddr(const char *prefix, const char *name,
 			       u8 val[6], bool fallback)
 {
@@ -161,7 +147,9 @@ static void nvram_read_macaddr(const char *prefix, const char *name,
 	if (err < 0)
 		return;
 
-	bcm47xx_nvram_parse_macaddr(buf, val);
+	strreplace(buf, '-', ':');
+	if (!mac_pton(buf, val))
+		pr_warn("Can not parse mac address: %s\n", buf);
 }
 
 static void nvram_read_alpha2(const char *prefix, const char *name,
-- 
2.15.1