netdev - RE: [PATCH] smsc911x: Add regulator support

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Date:	Mon, 17 Oct 2011 13:30:06 +0200
From:	Robert MARKLUND <robert.marklund@...ricsson.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Steve Glendinning <steve.glendinning@...c.com>,
	Mathieu Poirer <mathieu.poirier@...aro.org>
Subject: RE: [PATCH] smsc911x: Add regulator support

> -----Original Message-----
> From: Mark Brown [mailto:broonie@...nsource.wolfsonmicro.com]
> Sent: den 17 oktober 2011 12:53
> To: Robert MARKLUND
> Cc: netdev@...r.kernel.org; Steve Glendinning; Mathieu Poirer
> Subject: Re: [PATCH] smsc911x: Add regulator support
> 
> On Mon, Oct 17, 2011 at 08:56:37AM +0200, Robert Marklund wrote:
> 
> > +	/* Request regulator for vddvario */
> > +	if (request && !pdata->regulator_vddvario) {
> > +		pdata->regulator_vddvario = regulator_get(&pdev-
> >dev,
> > +				"vddvario");
> > +		if (IS_ERR(pdata->regulator_vddvario)) {
> > +			netdev_warn(ndev,
> > +					"%s: Failed to
> get regulator '%s'\n",
> > +					__func__,
> "vddvario");
> > +			pdata->regulator_vddvario = NULL;
> > +		}
> 
> No, this is broken - look at how other devices use the regulator API.
> The driver should just request and use the regulators unconditionally
> and let the stubbing and mapping facilities the API has deal with
> ensuring that they always succeed.

[Robert MARKLUND] 
So what you mean is get them and use them and ignore all the return codes, and let the FW take care of the error handling ?

> 
> As a side note the use of "pdata" as a name for the driver internal
> data
> is really not helpful, pdata is traditionally the platform data passed
> in by the machine (which would be even more broken).

[Robert MARKLUND] 
In the driver they have used this name for this structure throughout the file I just followed that.
Personally I think it will be more confusing to change the name of this structure in just this new function.

/R

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