linux-kernel - Re: [PATCH v2] backlight: propagate errors from get

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Message-ID: <4bb3051e-2550-43c3-afed-d4b00850126e@t-8ch.de>
Date:   Thu, 23 Sep 2021 12:49:48 +0200
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] backlight: propagate errors from get_brightness()

On 2021-09-23T10:48+0100, Lee Jones wrote:
> 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@...ssschuh.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.

Hi Lee,

thanks!

Also I'm sorry about my nagging before.
I was not aware you were on vacation and saw you respond to other mails.

Thomas