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.ge8...@n2100.arm.linux.org.uk
> 
> Signed-off-by: Niklas Cassel <nikl...@axis.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?

>               bool rmii_ref_clk_sel_25_mhz;
>  
>               priv->rmii_ref_clk_sel = type->has_rmii_ref_clk_sel;

Johan
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