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Subject[PATCH] backlight: change the return type of backlight_update_status() to int
Date
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>
---
include/linux/backlight.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/backlight.h b/include/linux/backlight.h
index adb14a8..1e7a69a 100644
--- a/include/linux/backlight.h
+++ b/include/linux/backlight.h
@@ -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,
--
1.9.1


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