Re: [PATCH 2/4] i2c: at91: implement i2c bus recovery

[Uwe Kleine-König]

On Fri, Oct 04, 2019 at 09:35:23AM +0000, Claudiu.Beznea@xxxxxxxxxxxxx wrote:
> Hi Kamel,
> 
> On 02.10.2019 17:46, Kamel Bouhara wrote:
> > +static int at91_init_twi_recovery_info(struct platform_device *pdev,
> > +				       struct at91_twi_dev *dev)
> > +{
> > +	struct i2c_bus_recovery_info *rinfo = &dev->rinfo;
> > +
> > +	dev->pinctrl = devm_pinctrl_get(&pdev->dev);
> > +	if (!dev->pinctrl || IS_ERR(dev->pinctrl)) {
> 
> You may use IS_ERR_OR_NULL() here.

Can devm_pinctrl_get return NULL? From a quick look, it cannot.

rule of thumb: IS_ERR_OR_NULL is wrong as it is a sign of poor return
value semantics.

Best regards
Uwe

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Pengutronix e.K.                           | Uwe Kleine-König            |
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