Re: [PATCH V3 15/20] cxl: Add a routine to find cxl root decoder on cxl bus using cxl port

[Neeraj Kumar]

On 24/09/25 11:11AM, Dave Jiang wrote:
> > +struct cxl_root_decoder *cxl_find_root_decoder_by_port(struct cxl_port *port)
> > +{
> > +	struct cxl_root *cxl_root __free(put_cxl_root) = find_cxl_root(port);
> > +	struct device *dev;
> > +
> > +	if (!cxl_root)
> > +		return NULL;
> > +
> > +	dev = device_find_child(&cxl_root->port.dev, NULL, match_root_decoder);
> > +	if (!dev)
> > +		return NULL;
> > +
> > +	/* Release device ref taken via device_find_child() */
> > +	put_device(dev);
>
> Should the caller release the device reference instead?
>
> DJ

Actually caller of this function wants to find root decoder information from cxl_port.
So in order to find root decoder we have used device_find_child() which internally
takes device ref. Therefore, just after finding the appropriate dev, I am releasing
device ref.
Its like taking device ref temporarly and releasing it then and there after finding
proper root decoder.
I believe, Releasing device ref from caller would make it look little out of context.


Regards,
Neeraj