wlcore: fix sparse warning

Use kstrtoul_from_user() for reading the user value,
and fix the following sparse warning:

drivers/net/wireless/ti/wlcore/debugfs.c:937:15: error: incompatible
types in comparison expression (different type sizes)

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 1 insertions, 8 deletions

diff --git a/drivers/net/wireless/ti/wlcore/debugfs.c b/drivers/net/wireless/ti/wlcore/debugfs.c
index 0be21f62fcb0..68f3bf229b5a 100644
--- a/drivers/net/wireless/ti/wlcore/debugfs.c
+++ b/drivers/net/wireless/ti/wlcore/debugfs.c
@@ -929,17 +929,10 @@ static ssize_t beacon_filtering_write(struct file *file,
 {
         struct wl1271 *wl = file->private_data;
         struct wl12xx_vif *wlvif;
-        char buf[10];
-        size_t len;
         unsigned long value;
         int ret;
 
-        len = min(count, sizeof(buf) - 1);
-        if (copy_from_user(buf, user_buf, len))
-                return -EFAULT;
-        buf[len] = '\0';
-
-        ret = kstrtoul(buf, 0, &value);
+        ret = kstrtoul_from_user(user_buf, count, 0, &value);
         if (ret < 0) {
                 wl1271_warning("illegal value for beacon_filtering!");
                 return -EINVAL;