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backlight: Change the return type of backlight_update_status() to int 

Backlight device returns the result of update_status(), but
backlight_update_status() ignores it. So the consumers cannot confirm the
result of their function call. This patch makes the result to be returned
back for consumers.

Signed-off-by: Hyungwon Hwang <human.hwang@samsung.com>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
hifive-unleashed-5.1
Hyungwon Hwang 2015-05-28 16:25:15 +09:00 committed by Lee Jones
parent cdaefccefa
commit cca0ba2df3
1 changed files with 6 additions and 2 deletions
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8
include/linux/backlight.h
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@ -117,12 +117,16 @@ struct backlight_device {
int use_count;
};
static inline void backlight_update_status(struct backlight_device *bd)
static inline int backlight_update_status(struct backlight_device *bd)
{
int ret = -ENOENT;
mutex_lock(&bd->update_lock);
if (bd->ops && bd->ops->update_status)
bd->ops->update_status(bd);
ret = bd->ops->update_status(bd);
mutex_unlock(&bd->update_lock);
return ret;
}
extern struct backlight_device *backlight_device_register(const char *name,