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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2015-12-06 02:39:39 +0300
committerLee Jones <lee.jones@linaro.org>2016-01-11 09:23:21 +0300
commita5656a708050bd3be5c3a3bc45297db21e88cecd (patch)
tree360c9a85f2d85f8a60faf9c937f141689ce5e249 /drivers/mfd/wm831x-otp.c
parentdb2fb60cd35d2d03699e570906ced73b4c05586e (diff)
downloadlinux-a5656a708050bd3be5c3a3bc45297db21e88cecd.tar.xz
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 <linux@rasmusvillemoes.dk> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/wm831x-otp.c')
-rw-r--r--drivers/mfd/wm831x-otp.c10
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);