diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 186e02f7cc32dd4bd30a9176778261dd333c4437..267ed45ef6a2aa05fa49c3078ca4a9cc32c86382 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -195,20 +195,12 @@ static ssize_t uapsd_queues_write(struct file *file,
 				  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;