On Friday 26 October 2012, Chris Brand wrote:
> > @@ -124,6 +156,12 @@ static int __devinit pwm_probe(struct
> > platform_device *pdev)
> > chip->chip.base = -1;
> > chip->chip.npwm = VT8500_NR_PWMS;
> >
> > + chip->clk = devm_clk_get(&pdev->dev, NULL);
> > + if (IS_ERR_OR_NULL(chip->clk)) {
> > + dev_err(&pdev->dev, "clock source not specified\n");
> > + return PTR_ERR(chip->clk);
> > + }
> > +
>
> Do you want IS_ERR() rather than IS_ERR_OR_NULL() here ?
> Otherwise you may return PTR_ERR(NULL).
>
Right. devm_clk_get() never returns NULL, but as Russell pointed out
recently, this usage of IS_ERR_OR_NULL() is completely bogus.
Arnd
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