[PATCH] LED: Fix sysfs store function error handling
Fix the error handling of some LED _store functions. This corrects them to
return -EINVAL if the value is not numeric with an optional byte of trailing
whitespace.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index b0b5d05..c75d0ef 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -19,6 +19,7 @@
#include <linux/sysdev.h>
#include <linux/timer.h>
#include <linux/err.h>
+#include <linux/ctype.h>
#include <linux/leds.h>
#include "leds.h"
@@ -43,9 +44,13 @@
ssize_t ret = -EINVAL;
char *after;
unsigned long state = simple_strtoul(buf, &after, 10);
+ size_t count = after - buf;
- if (after - buf > 0) {
- ret = after - buf;
+ if (*after && isspace(*after))
+ count++;
+
+ if (count == size) {
+ ret = count;
led_set_brightness(led_cdev, state);
}