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| author | Alexander Clouter <alex@digriz.org.uk> | 2010-07-06 00:11:26 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-08-05 16:26:02 +0400 |
| commit | d16f7093b6eb4f3859856f6ee4ab504cbeeea0b9 (patch) | |
| tree | 66e693d7562ffa2393b934f78e112bc2a9b59e41 /arch | |
| parent | 0d59050496db973d8689f954baf8a202ddd4d51a (diff) | |
| download | linux-d16f7093b6eb4f3859856f6ee4ab504cbeeea0b9.tar.xz | |
MIPS: AR7: rewrite of cpmac_get_mac()
Shamelessly stealing wisdom from pasemi_mac.c, I found char2hex() could
be replaced with a single call to sscanf(), looks cleaner to me at
least. The result is 100 bytes trimmed off the size of a compiled
cpmac_get_mac() and as an extra bonus it grumbles and gracefully fails
over to using random_ether_addr() when an attempt to parse an invalid
MAC address is made.
Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
To: linux-mips@linux-mips.org
Cc: florian@openwrt.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/ar7/platform.c | 42 |
1 files changed, 15 insertions, 27 deletions
diff --git a/arch/mips/ar7/platform.c b/arch/mips/ar7/platform.c index 8f31d1d59683..0da5b2b8dd88 100644 --- a/arch/mips/ar7/platform.c +++ b/arch/mips/ar7/platform.c @@ -292,40 +292,28 @@ static struct platform_device cpmac_high = { .num_resources = ARRAY_SIZE(cpmac_high_res), }; -static inline unsigned char char2hex(char h) +static void __init cpmac_get_mac(int instance, unsigned char *dev_addr) { - switch (h) { - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - return h - '0'; - case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': - return h - 'A' + 10; - case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': - return h - 'a' + 10; - default: - return 0; - } -} - -static void cpmac_get_mac(int instance, unsigned char *dev_addr) -{ - int i; - char name[5], default_mac[ETH_ALEN], *mac; + char name[5], *mac; - mac = NULL; sprintf(name, "mac%c", 'a' + instance); mac = prom_getenv(name); - if (!mac) { + if (!mac && instance) { sprintf(name, "mac%c", 'a'); mac = prom_getenv(name); } - if (!mac) { - random_ether_addr(default_mac); - mac = default_mac; - } - for (i = 0; i < 6; i++) - dev_addr[i] = (char2hex(mac[i * 3]) << 4) + - char2hex(mac[i * 3 + 1]); + + if (mac) { + if (sscanf(mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", + &dev_addr[0], &dev_addr[1], + &dev_addr[2], &dev_addr[3], + &dev_addr[4], &dev_addr[5]) != 6) { + pr_warning("cannot parse mac address, " + "using random address\n"); + random_ether_addr(dev_addr); + } + } else + random_ether_addr(dev_addr); } /***************************************************************************** |