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path: root/drivers/video/backlight/lcd.c
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Diffstat (limited to 'drivers/video/backlight/lcd.c')
-rw-r--r--drivers/video/backlight/lcd.c26
1 files changed, 10 insertions, 16 deletions
diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index 71a11cadffc..79c1b0d609a 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -97,19 +97,16 @@ static ssize_t lcd_store_power(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int rc = -ENXIO;
- char *endp;
struct lcd_device *ld = to_lcd_device(dev);
- int power = simple_strtoul(buf, &endp, 0);
- size_t size = endp - buf;
+ unsigned long power;
- if (isspace(*endp))
- size++;
- if (size != count)
- return -EINVAL;
+ rc = kstrtoul(buf, 0, &power);
+ if (rc)
+ return rc;
mutex_lock(&ld->ops_lock);
if (ld->ops && ld->ops->set_power) {
- pr_debug("lcd: set power to %d\n", power);
+ pr_debug("lcd: set power to %lu\n", power);
ld->ops->set_power(ld, power);
rc = count;
}
@@ -136,19 +133,16 @@ static ssize_t lcd_store_contrast(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int rc = -ENXIO;
- char *endp;
struct lcd_device *ld = to_lcd_device(dev);
- int contrast = simple_strtoul(buf, &endp, 0);
- size_t size = endp - buf;
+ unsigned long contrast;
- if (isspace(*endp))
- size++;
- if (size != count)
- return -EINVAL;
+ rc = kstrtoul(buf, 0, &contrast);
+ if (rc)
+ return rc;
mutex_lock(&ld->ops_lock);
if (ld->ops && ld->ops->set_contrast) {
- pr_debug("lcd: set contrast to %d\n", contrast);
+ pr_debug("lcd: set contrast to %lu\n", contrast);
ld->ops->set_contrast(ld, contrast);
rc = count;
}