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Subject[PATCH 03/11] drivers: net: optimize hex2bin()
Date
From: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>

Optimize hex2bin() function used in ps3_gelic_wireless.c. It requires to have
hex_to_bin() implementation introduced by starter patch in series.

Signed-off-by: Andy Shevchenko <ext-andriy.shevchenko@nokia.com>
Cc: Geoff Levand <geoffrey.levand@am.sony.com>
---
drivers/net/ps3_gelic_wireless.c | 12 ++++--------
1 files changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ps3_gelic_wireless.c b/drivers/net/ps3_gelic_wireless.c
index 227b141..43e9688 100644
--- a/drivers/net/ps3_gelic_wireless.c
+++ b/drivers/net/ps3_gelic_wireless.c
@@ -1394,23 +1394,19 @@ static int gelic_wl_get_mode(struct net_device *netdev,
static int hex2bin(u8 *str, u8 *bin, unsigned int len)
{
unsigned int i;
- static unsigned char *hex = "0123456789ABCDEF";
- unsigned char *p, *q;
- u8 tmp;

if (len != WPA_PSK_LEN * 2)
return -EINVAL;

for (i = 0; i < WPA_PSK_LEN * 2; i += 2) {
- p = strchr(hex, toupper(str[i]));
- q = strchr(hex, toupper(str[i + 1]));
- if (!p || !q) {
+ int h = hex_to_bin(str[i]);
+ int l = hex_to_bin(str[i+1]);
+ if ((h == -1) || (l == -1)) {
pr_info("%s: unconvertible PSK digit=%d\n",
__func__, i);
return -EINVAL;
}
- tmp = ((p - hex) << 4) + (q - hex);
- *bin++ = tmp;
+ *bin++ = (h << 4) + l;
}
return 0;
};
--
1.5.6.5


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