On Thu, 28 May 2015, Hyungwon Hwang wrote:
> 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.hw...@samsung.com>
> ---
> include/linux/backlight.h | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
Applied with Jingoo's Ack, thanks.
> 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,
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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