linux-kernel - Re: [PATCH] net: phy: micrel: support !CONFIG_HAVE

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Message-ID: <20150427110807.GB10925@localhost>
Date:	Mon, 27 Apr 2015 13:08:07 +0200
From:	Johan Hovold <johan@...nel.org>
To:	Niklas Cassel <niklas.cassel@...s.com>
Cc:	davem@...emloft.net, f.fainelli@...il.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, johan@...nel.org,
	Niklas Cassel <niklass@...s.com>
Subject: Re: [PATCH] net: phy: micrel: support !CONFIG_HAVE_CLK

On Mon, Apr 27, 2015 at 01:05:17PM +0200, Johan Hovold wrote:
> On Mon, Apr 27, 2015 at 01:00:50PM +0200, Niklas Cassel wrote:
> > Since NULL is a valid clock, we shouldn't use
> > IS_ERR_OR_NULL.
> > 
> > Implemented as Russell King suggested in:
> > 
> > http://lkml.kernel.org/r/20150207172949.GE8656@n2100.arm.linux.org.uk
> > 
> > Signed-off-by: Niklas Cassel <niklass@...s.com>
> > ---
> >  drivers/net/phy/micrel.c | 7 +++++--
> >  1 file changed, 5 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
> > index 1190fd8..d958d13 100644
> > --- a/drivers/net/phy/micrel.c
> > +++ b/drivers/net/phy/micrel.c
> > @@ -522,6 +522,7 @@ static int kszphy_probe(struct phy_device *phydev)
> >  	struct device_node *np = phydev->dev.of_node;
> >  	struct kszphy_priv *priv;
> >  	struct clk *clk;
> > +	unsigned long rate = 0;
> >  	int ret;
> >  
> >  	priv = devm_kzalloc(&phydev->dev, sizeof(*priv), GFP_KERNEL);
> > @@ -548,8 +549,10 @@ static int kszphy_probe(struct phy_device *phydev)
> >  	}
> >  
> >  	clk = devm_clk_get(&phydev->dev, "rmii-ref");
> > -	if (!IS_ERR(clk)) {
> > -		unsigned long rate = clk_get_rate(clk);
> > +	if (!IS_ERR(clk))
> > +		rate = clk_get_rate(clk);
> > +
> > +	if (rate) {
> 
> And how do you expect this to work as clk_get_rate returns -EINVAL when
> clk is NULL?
> 
> Have you not tested your patch?

Nevermind, it is 0 if !CONFIG_HAVE_CLK, but still does not look like the
right fix.

Johan
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