linux-kernel - Re: [PATCH 2/3] of: dynamic: add of_node_alloc() and of_node

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Date:   Mon, 9 May 2022 11:55:02 -0500
From:   Rob Herring <robh@...nel.org>
To:     Clément Léger <clement.leger@...tlin.com>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Frank Rowand <frowand.list@...il.com>,
        Nathan Lynch <nathanl@...ux.ibm.com>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Daniel Henrique Barboza <danielhb413@...il.com>,
        David Gibson <david@...son.dropbear.id.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Ohhoon Kwon <ohoono.kwon@...sung.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        YueHaibing <yuehaibing@...wei.com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org,
        Allan Nielsen <allan.nielsen@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Steen Hegelund <steen.hegelund@...rochip.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 2/3] of: dynamic: add of_node_alloc() and of_node_free()

On Fri, May 6, 2022 at 5:45 AM Clément Léger <clement.leger@...tlin.com> wrote:
>
> Le Thu, 5 May 2022 14:43:54 -0500,
> Rob Herring <robh@...nel.org> a écrit :
>
> > On Wed, May 04, 2022 at 05:40:32PM +0200, Clément Léger wrote:
> > > Add functions which allows to create and free nodes.
> > >
> > > Signed-off-by: Clément Léger <clement.leger@...tlin.com>
> > > ---
> > >  drivers/of/dynamic.c | 59 ++++++++++++++++++++++++++++++++++++--------
> > >  include/linux/of.h   |  9 +++++++
> > >  2 files changed, 58 insertions(+), 10 deletions(-)
> > >
> > > diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
> > > index e8700e509d2e..ec28e5ba2969 100644
> > > --- a/drivers/of/dynamic.c
> > > +++ b/drivers/of/dynamic.c
> > > @@ -455,6 +455,54 @@ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags)
> > >                              prop->length, allocflags);
> > >  }
> > >
> > > +/**
> > > + * of_node_free - Free a node allocated dynamically.
> > > + * @node:  Node to be freed
> > > + */
> > > +void of_node_free(const struct device_node *node)
> > > +{
> > > +   kfree(node->full_name);
> > > +   kfree(node->data);
> > > +   kfree(node);
> > > +}
> > > +EXPORT_SYMBOL(of_node_free);
> >
> > This shouldn't be needed. Nodes are refcounted, so any caller should
> > just do a put.
>
> Acked. Do you want the name to be allocated as part of the node
> allocation also ?

Yeah, I think that would be fine.

Rob