linux-kernel - Re: [PATCH] regulator: ab8500-ext: Don't register without initialisation data

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Date:	Wed, 22 May 2013 16:08:10 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Lee Jones <lee.jones@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mark Brown <broonie@...nel.org>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	Srinidhi KASAGAR <srinidhi.kasagar@...ricsson.com>
Subject: Re: [PATCH] regulator: ab8500-ext: Don't register without initialisation data

On Wednesday 22 May 2013, Linus Walleij wrote:
> > diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c
> > index b4d4547..8421537 100644
> > --- a/drivers/regulator/ab8500-ext.c
> > +++ b/drivers/regulator/ab8500-ext.c
> > @@ -334,6 +334,12 @@ int ab8500_ext_regulator_init(struct platform_device *pdev)
> >                 return -EINVAL;
> >         }
> >
> > +       /* have any external regulators been specified? */
> > +       if (pdata->num_ext_regulator == 0) {
> > +               dev_warn(&pdev->dev, "Not using external regulators\n");
> > +               return 0;
> > +       }
> 
> dev_warn() is really when we warn about something really nasty, worse
> than dev_err(). It seems dev_info() is more apropriate.

Are you confusing it with dev_crit()?

This is how the levels are defined, and "warning" is less urgent than "error":

#define KERN_EMERG      KERN_SOH "0"    /* system is unusable */
#define KERN_ALERT      KERN_SOH "1"    /* action must be taken immediately */
#define KERN_CRIT       KERN_SOH "2"    /* critical conditions */
#define KERN_ERR        KERN_SOH "3"    /* error conditions */
#define KERN_WARNING    KERN_SOH "4"    /* warning conditions */
#define KERN_NOTICE     KERN_SOH "5"    /* normal but significant condition */
#define KERN_INFO       KERN_SOH "6"    /* informational */
#define KERN_DEBUG      KERN_SOH "7"    /* debug-level messages */

	Arnd
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