linux-kernel - Re: [PATCH 2/2] ASoC: tegra: probe deferral error reporting

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Message-ID: <20180721095615.GG16228@sirena.org.uk>
Date:   Sat, 21 Jul 2018 10:56:15 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Marcel Ziswiler <marcel.ziswiler@...adex.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jonathanh@...dia.com" <jonathanh@...dia.com>,
        "thierry.reding@...il.com" <thierry.reding@...il.com>,
        "tiwai@...e.com" <tiwai@...e.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "perex@...ex.cz" <perex@...ex.cz>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH 2/2] ASoC: tegra: probe deferral error reporting

On Fri, Jul 20, 2018 at 12:31:07PM +0000, Marcel Ziswiler wrote:
> On Fri, 2018-07-20 at 13:16 +0100, Mark Brown wrote:

> > >  	ac97->sync_gpio = of_get_named_gpio(pdev->dev.of_node,
> > >  					    "nvidia,codec-sync-
> > > gpio", 0);
> > >  	if (!gpio_is_valid(ac97->sync_gpio)) {
> > > -		dev_err(&pdev->dev, "no codec-sync GPIO
> > > supplied\n");
> > > +		ret = ac97->sync_gpio;
> > > +		dev_err(&pdev->dev, "no codec-sync GPIO supplied:
> > > %d\n", ret);
> > >  		goto err_clk_put;
> > >  	}

> > This isn't reporting an error code associated with the attempt to
> > find a
> > codec-sync GPIO, it's the result of some other operation.

> What exactly is then the of_get_named_gpio() above please doing if
> not getting the codec sync GPIO? I am not following you, sorry.

It's not in any way involved in setting the value of ret, whatever value
that has it's nothing to do with that operation.

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