linux-kernel - Re: [PATCH v6] backlight: led-backlight: add devlink to supplier LEDs

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Message-ID: <aQJSqJOrtETMKt8x@aspen.lan>
Date: Wed, 29 Oct 2025 17:45:12 +0000
From: Daniel Thompson <danielt@...nel.org>
To: "Sverdlin, Alexander" <alexander.sverdlin@...mens.com>
Cc: "jingoohan1@...il.com" <jingoohan1@...il.com>,
	"tomi.valkeinen@...com" <tomi.valkeinen@...com>,
	"lee@...nel.org" <lee@...nel.org>,
	"luca.ceresoli@...tlin.com" <luca.ceresoli@...tlin.com>,
	"tony@...mide.com" <tony@...mide.com>,
	"pavel@....cz" <pavel@....cz>, "deller@....de" <deller@....de>,
	"jjhiblot@...com" <jjhiblot@...com>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"thomas.petazzoni@...tlin.com" <thomas.petazzoni@...tlin.com>,
	"saravanak@...gle.com" <saravanak@...gle.com>,
	"herve.codina@...tlin.com" <herve.codina@...tlin.com>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"alexander.sverdlin@...il.com" <alexander.sverdlin@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"daniel.thompson@...aro.org" <daniel.thompson@...aro.org>
Subject: Re: [PATCH v6] backlight: led-backlight: add devlink to supplier LEDs

On Thu, Oct 23, 2025 at 12:41:30PM +0000, Sverdlin, Alexander wrote:
> Hi Lee, Daniel, Jingoo,
>
> On Mon, 2025-05-19 at 22:19 +0200, Luca Ceresoli wrote:
> > led-backlight is a consumer of one or multiple LED class devices, but
> > devlink is currently unable to create correct supplier-producer links when
> > the supplier is a class device. It creates instead a link where the
> > supplier is the parent of the expected device.
> > <snip>
> > Fixes: ae232e45acf9 ("backlight: add led-backlight driver")
> > Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
> > Reviewed-by: Herve Codina <herve.codina@...tlin.com>
>
> I've noticed that the patch in archived in the patchwork [1] but I wasn't
> able to find it in any branch of the backlight tree [2].
>
> Could it be that the patch somehow slipped through?
> It does solve a real-world crash, could you please consider to apply it?

Sorry folks. I overlooked this in my backlog and never posted the R-b
(which helps Lee figure out what to hoover up).

Reviewed-by: Daniel Thompson (RISCstar) <danielt@...nel.org>


Daniel.