[PATCH v2] backlight: propagate errors from get_brightness()

[Lee Jones]

On Tue, 07 Sep 2021, Thomas Weißschuh wrote:

> backlight.h documents "struct backlight_ops->get_brightness()" to return
> a negative errno on failure.
> So far these errors have not been handled in the backlight core.
> This leads to negative values being exposed through sysfs although only
> positive values are documented to be reported.
> 
> Signed-off-by: Thomas Weißschuh <linux at weissschuh.net>
> ---
> 
> v1: https://lore.kernel.org/dri-devel/20210906215525.15418-1-linux@weissschuh.net/
> 
> v1 -> v2:
> * use dev_err() instead of dev_warn() (Daniel Thompson)
> * Finish logging format string with newline (Daniel Thompson)
> * Log errno via dedicated error pointer format (Daniel Thompson)
> 
>  drivers/video/backlight/backlight.c | 22 +++++++++++++++++-----
>  1 file changed, 17 insertions(+), 5 deletions(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
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