From a5656a708050bd3be5c3a3bc45297db21e88cecd Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Sun, 6 Dec 2015 00:39:39 +0100 Subject: [PATCH] mfd: wm831x: Fix broken wm831x_unique_id_show wm831x_unique_id_show currently displays an interesting pattern of '0' and '3' characters which isn't very useful (figuring out why is left as an exercise for the reader). Presumably "buf[i]" should have been "id[i] & 0xff". But while there, it is much simpler to simply use %phN and do all the formatting at once. Signed-off-by: Rasmus Villemoes Acked-by: Charles Keepax Signed-off-by: Lee Jones --- drivers/mfd/wm831x-otp.c | 10 ++-------- 1 file 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); -- 2.20.1