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

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Message-ID: <cb817cdc-449e-4587-ab79-36be4f49f8d4@t-8ch.de>
Date:   Tue, 7 Sep 2021 16:52:38 +0200
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Daniel Thompson <daniel.thompson@...aro.org>
Cc:     Lee Jones <lee.jones@...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 2021-09-07T14:10+0100, Daniel Thompson wrote:
> On Tue, Sep 07, 2021 at 02:47:51PM +0200, 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>
> 
> Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>

Thanks!

Thomas