[PATCH] ieee80211 Switched to sscanf in store_debug_level

Switched to sscanf as per friendly comment in store_debug_level.

Signed-off-by: James Ketrenos <jketreno@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

diff --git a/net/ieee80211/ieee80211_module.c b/net/ieee80211/ieee80211_module.c
index 03a47343ddc75a386370e9e07861299faf9e71ae..4b43ae1235f964c8489a62dd4757335e5221907c 100644 (file)
--- a/net/ieee80211/ieee80211_module.c
+++ b/net/ieee80211/ieee80211_module.c
@@ -195,34 +195,20 @@ static int show_debug_level(char *page, char **start, off_t offset,
 static int store_debug_level(struct file *file, const char __user * buffer,
                             unsigned long count, void *data)
 {
-       char buf[] = "0x00000000";
-       char *p = (char *)buf;
+       char buf[] = "0x00000000\n";
+       unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
        unsigned long val;
 
-       if (count > sizeof(buf) - 1)
-               count = sizeof(buf) - 1;
-
-       if (copy_from_user(buf, buffer, count))
+       if (copy_from_user(buf, buffer, len))
                return count;
-       buf[count] = 0;
-       /*
-        * what a FPOS...  What, sscanf(buf, "%i", &val) would be too
-        * scary?
-        */
-       if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
-               p++;
-               if (p[0] == 'x' || p[0] == 'X')
-                       p++;
-               val = simple_strtoul(p, &p, 16);
-       } else
-               val = simple_strtoul(p, &p, 10);
-       if (p == buf)
+       buf[len] = 0;
+       if (sscanf(buf, "%li", &val) != 1)
                printk(KERN_INFO DRV_NAME
                       ": %s is not in hex or decimal form.\n", buf);
        else
                ieee80211_debug_level = val;
 
-       return strlen(buf);
+       return strnlen(buf, len);
 }
 
 static int __init ieee80211_init(void)