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

[Lee Jones]

On Thu, 23 Sep 2021, Thomas Weißschuh wrote:

> 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 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.
> 
> Hi Lee,
> 
> thanks!
> 
> Also I'm sorry about my nagging before.

No worries.

> I was not aware you were on vacation and saw you respond to other mails.

They were in the queue before this one.

I had hundreds of emails to get through on my return!

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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