diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2015-12-06 02:39:39 +0300 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2016-01-11 09:23:21 +0300 |
| commit | a5656a708050bd3be5c3a3bc45297db21e88cecd (patch) | |
| tree | 360c9a85f2d85f8a60faf9c937f141689ce5e249 /drivers/mfd/wm831x-otp.c | |
| parent | db2fb60cd35d2d03699e570906ced73b4c05586e (diff) | |
| download | linux-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.c | 10 |
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); |