Re: [RFC PATCH v2 07/22] ASoC: Add SOC USB APIs for adding an USB backend

[Zhou Furong]

> > +void *snd_soc_usb_get_priv_data(struct device *usbdev)
> > +{
> > +	struct snd_soc_usb *ctx;
> > +
> > +	if (!usbdev)
> > +		return NULL;
>
> How could usbdev ever be NULL?
The method is exported to public, valid check should be reasonable
as someone may call it by mistake

> > +
> > +	ctx = snd_soc_find_usb_ctx(usbdev);
> > +
> > +	return ctx ? ctx->priv_data : NULL;
> > +}
> > +EXPORT_SYMBOL_GPL(snd_soc_usb_get_priv_data);
> > +