Re: [PATCH v5 1/9] clkdev: add managed clkdev lookup registration

[Matti Vaittinen]

Hello Russell,

Thanks for the review. I do appreciate this. I'll send out v6 where I'll
have these fixed =)

On Mon, Dec 03, 2018 at 06:06:12PM +0000, Russell King - ARM Linux wrote:
> > +static int devm_clk_match_clkdev(struct device *dev, void *res, void *data)
> > +{
> > +	struct clk_lookup **l = res;
> > +
> > +	if (!l || !*l) {
> > +		WARN_ON(!l || !*l);
> 
> How can "l" be NULL here?  How can *l be NULL?

I really don't know if there is any "sane" way to end up having the
devres data NULLed. I admit I looked an example on how others had
implemented the match. These checks were present in devm_clk_match
and devm_regmap_irq_chip_match so I assumed there is a way to end up
having NULL there. Thus I played safe. OTOH it seems that for example
devm_hwmon_match does omit these checks and I really don't see right
away why the dr->data would be NULL. So I'll remove the check.

Br,
	Matti Vaittinen

> 
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-- 
Matti Vaittinen
ROHM Semiconductors

~~~ "I don't think so," said Rene Descartes.  Just then, he vanished ~~~