Messages in this thread Patch in this message | | | From | Hyungwon Hwang <> | Subject | [PATCH] backlight: change the return type of backlight_update_status() to int | Date | Thu, 28 May 2015 16:25:15 +0900 |
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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> --- 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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