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

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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>
This commit is contained in:
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; 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); mutex_lock(&bd->update_lock);
if (bd->ops && bd->ops->update_status) if (bd->ops && bd->ops->update_status)
bd->ops->update_status(bd); ret = bd->ops->update_status(bd);
mutex_unlock(&bd->update_lock); mutex_unlock(&bd->update_lock);
return ret;
} }
extern struct backlight_device *backlight_device_register(const char *name, extern struct backlight_device *backlight_device_register(const char *name,