linux-kernel - Re: [PATCH 1/2] phy: marvell: comphy: Convert internal SMCC firmware return codes to errno

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Date:   Wed, 2 Sep 2020 19:00:10 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Pali Rohár <pali@...nel.org>
Cc:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Marek Behún <marek.behun@....cz>,
        Tomasz Maciej Nowak <tmn505@...il.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] phy: marvell: comphy: Convert internal SMCC firmware
 return codes to errno

> > > +	switch (ret) {
> > > +	case SMCCC_RET_SUCCESS:
> > > +		return 0;
> > > +	case SMCCC_RET_NOT_SUPPORTED:
> > > +		return -EOPNOTSUPP;
> > > +	default:
> > > +		return -EINVAL;
> > > +	}
> > >  }
> > 
> > Hi Pali
> > 
> > Maybe this should be a global helper translating SMCCC_RET_* into a
> > standard errno value?
> > 
> > 	 Andrew
> 
> Hello Andrew!
> 
> Well, I'm not sure if some standard global helper is the correct way for
> marvell comphy handler. It returns 0 for success and -1 on error when
> handler is not supported.

No, i was meaning just 

switch (ret) {
case SMCCC_RET_SUCCESS:
	return 0;
case SMCCC_RET_NOT_SUPPORTED:
	return -EOPNOTSUPP;
default:
	return -EINVAL;
}

There is nothing Marvell specific here.

      Andrew