net/mac80211/debugfs: Convert to kstrou8_from_user
This patch replaces the code for getting an number from a
userspace buffer by a simple call to kstrou8_from_user.
This makes it easier to read and less error prone.
Since the old buffer was only 10 bytes long and the value is masked by a
nibble-mask anyway, we don't need to use kstrtoul but rather kstrtou8.
Kernel Version: v3.0-rc2
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 186e02f..267ed45 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -195,20 +195,12 @@
size_t count, loff_t *ppos)
{
struct ieee80211_local *local = file->private_data;
- unsigned long val;
- char buf[10];
- size_t len;
+ u8 val;
int ret;
- len = min(count, sizeof(buf) - 1);
- if (copy_from_user(buf, user_buf, len))
- return -EFAULT;
- buf[len] = '\0';
-
- ret = strict_strtoul(buf, 0, &val);
-
+ ret = kstrtou8_from_user(user_buf, count, 0, &val);
if (ret)
- return -EINVAL;
+ return ret;
if (val & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
return -ERANGE;