linux-kernel - Re: [PATCH 1/2] backlight: hx8357: switch to using gpiod API

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Message-ID: <Y+J2nRyDpOE0ihfj@aspen.lan>
Date:   Tue, 7 Feb 2023 16:04:45 +0000
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Lee Jones <lee@...nel.org>, Jingoo Han <jingoohan1@...il.com>,
        Helge Deller <deller@....de>, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] backlight: hx8357: switch to using gpiod API

On Mon, Feb 06, 2023 at 08:15:56PM -0800, Dmitry Torokhov wrote:
> On Mon, Feb 06, 2023 at 11:35:32AM +0000, Daniel Thompson wrote:
> > On Tue, Jan 31, 2023 at 02:57:06PM -0800, Dmitry Torokhov wrote:
> > > +				dev_info(&spi->dev, "im gpio[%d] is not here yet, deferring the probe\n",
> > > +					 i);
> > > +			} else {
> > > +				dev_err(&spi->dev, "failed to request im gpio[%d]: %d\n",
> > > +					i, ret);
> > >  			}
> >
> > These last two clauses should be updated to return dev_err_probe(...)
> > instead.
> >
> > With that change:
> > Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
>
> So you want to actually suppress the deferral message unless debug
> printks are enabled? So you want this to read:
>
>
> 		if (ret) {
> 			if (ret == -ENOENT) {
> 				if (i == 0)
> 					break;
>
> 				dev_err(&spi->dev, "Missing im gpios[%d]\n", i);
> 				return -EINVAL;
> 			}
>
> 			return dev_err_probe(&spi->dev, ret,
> 					     "failed to request im gpio[%d]\n", i);
> 		}
>
> Did I get it right?

LGTM.


Daniel.