1 files changed, 2 insertions, 8 deletions

diff --git a/drivers/mfd/wm831x-otp.c b/drivers/mfd/wm831x-otp.c
index b90f3e06b6c9..ebac0027f8e0 100644
--- a/drivers/mfd/wm831x-otp.c
+++ b/drivers/mfd/wm831x-otp.c
@@ -47,20 +47,14 @@ static ssize_t wm831x_unique_id_show(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
         struct wm831x *wm831x = dev_get_drvdata(dev);
-        int i, rval;
+        int rval;
         char id[WM831X_UNIQUE_ID_LEN];
-        ssize_t ret = 0;
 
         rval = wm831x_unique_id_read(wm831x, id);
         if (rval < 0)
                 return 0;
 
-        for (i = 0; i < WM831X_UNIQUE_ID_LEN; i++)
-                ret += sprintf(&buf[ret], "%02x", buf[i]);
-
-        ret += sprintf(&buf[ret], "\n");
-
-        return ret;
+        return sprintf(buf, "%*phN\n", WM831X_UNIQUE_ID_LEN, id);
 }
 
 static DEVICE_ATTR(unique_id, 0444, wm831x_unique_id_show, NULL);