linux-kernel - Re: [PATCH v2 2/6] firmware: ti

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Message-ID: <20240731130139.ysmaa4h5istdnpdj@sedate>
Date: Wed, 31 Jul 2024 08:01:39 -0500
From: Nishanth Menon <nm@...com>
To: Markus Schneider-Pargmann <msp@...libre.com>
CC: Tero Kristo <kristo@...nel.org>, Santosh Shilimkar <ssantosh@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Vibhore Vardhan <vibhore@...com>, Kevin Hilman <khilman@...libre.com>,
        Dhruva
 Gole <d-gole@...com>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/6] firmware: ti_sci: Partial-IO support

On 14:36-20240731, Markus Schneider-Pargmann wrote:
> > > > > +		for (i = 0; i != info->nr_wakeup_sources; ++i) {
> > > > > +			struct device_node *devnode =
> > > > > +				of_parse_phandle(dev->of_node,
> > > > > +						 "ti,partial-io-wakeup-sources",
> > > > > +						 i);
> > > > > +			info->wakeup_source_nodes[i] = devnode;
> > > > 
> > > > Curious: Don't we need to maintain reference counting for the devnode
> > > > if CONFIG_OF_DYNAMIC?
> > > 
> > > In case you mean I missed of_node_put(), yes, I did, thank you. I added
> > > it in a ti_sci_remove().
> > 
> > And unless I am mistaken, of_node_get as required as you are
> > retaining the reference of the node till shutdown / remove is invoked.
> 
> The function documentation says the refcount is already incremented:
> 
>  * Return: The device_node pointer with refcount incremented.  Use
>  * of_node_put() on it when done.
> 

Yes indeed. I missed it. Thanks for looking it up.

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D