linux-kernel - Re: [RFC PATCH v3 1/5] of: dynamic: Add of_changeset_update_prop

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Message-ID: <CAGXv+5GiwgF4CJBPT7JucV8qEMY0jLAvT3TqRzvLjCKcVMZ0Mg@mail.gmail.com>
Date:   Mon, 4 Dec 2023 14:28:20 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Wolfram Sang <wsa@...nel.org>,
        Benson Leung <bleung@...omium.org>,
        Tzung-Bi Shih <tzungbi@...nel.org>,
        chrome-platform@...ts.linux.dev, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan@...nel.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        andriy.shevchenko@...ux.intel.com, Jiri Kosina <jikos@...nel.org>,
        linus.walleij@...aro.org, broonie@...nel.org,
        gregkh@...uxfoundation.org, hdegoede@...hat.com,
        james.clark@....com, james@...iv.tech, keescook@...omium.org,
        rafael@...nel.org, tglx@...utronix.de,
        Jeff LaBundy <jeff@...undy.com>, linux-input@...r.kernel.org,
        linux-i2c@...r.kernel.org
Subject: Re: [RFC PATCH v3 1/5] of: dynamic: Add of_changeset_update_prop_string

On Sat, Dec 2, 2023 at 9:01 AM Doug Anderson <dianders@...omium.org> wrote:
>
> Hi,
>
> On Tue, Nov 28, 2023 at 12:45 AM Chen-Yu Tsai <wenst@...omium.org> wrote:
> >
> > @@ -1039,3 +1039,50 @@ int of_changeset_add_prop_u32_array(struct of_changeset *ocs,
> >         return ret;
> >  }
> >  EXPORT_SYMBOL_GPL(of_changeset_add_prop_u32_array);
> > +
> > +static int of_changeset_update_prop_helper(struct of_changeset *ocs,
> > +                                          struct device_node *np,
> > +                                          const struct property *pp)
> > +{
> > +       struct property *new_pp;
> > +       int ret;
> > +
> > +       new_pp = __of_prop_dup(pp, GFP_KERNEL);
> > +       if (!new_pp)
> > +               return -ENOMEM;
> > +
> > +       ret = of_changeset_update_property(ocs, np, new_pp);
> > +       if (ret) {
> > +               kfree(new_pp->name);
> > +               kfree(new_pp->value);
> > +               kfree(new_pp);
>
> Given that this is the 3rd copy of the freeing logic, does it make
> sense to make __of_prop_free() that's documented to free what was
> returned by __of_prop_dupe()?

Makes sense.  There's also one in property_list_free(). I'll add a patch
for it.

ChenYu