linux-kernel - Re: [PATCH v2 0/4] of: automate of_node_put()

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Date: Fri, 23 Feb 2024 17:38:31 +0100 (CET)
From: Julia Lawall <julia.lawall@...ia.fr>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
    linux-iio@...r.kernel.org, Rob Herring <robh@...nel.org>, 
    Frank Rowand <frowand.list@...il.com>, linux-kernel@...r.kernel.org, 
    Peter Zijlstra <peterz@...radead.org>, 
    Greg Kroah-Hartman <gregkh@...uxfoundation.org>, marek.vasut@...il.com
Subject: Re: [PATCH v2 0/4] of: automate of_node_put() - new approach to
 loops.



On Fri, 23 Feb 2024, Jonathan Cameron wrote:

> On Fri, 23 Feb 2024 17:52:46 +0200
> Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:
>
> > On Fri, Feb 23, 2024 at 12:44:28PM +0000, Jonathan Cameron wrote:
> > > The equivalent device_for_each_child_node_scoped() series for
> > > fwnode will be queued up in IIO for the merge window shortly as
> > > it has gathered sufficient tags. Hopefully the precdent set there
> > > for the approach will reassure people that instantiating the
> > > child variable inside the macro definition is the best approach.
> > > https://lore.kernel.org/linux-iio/20240217164249.921878-1-jic23@kernel.org/
> > >
> > > v2: Andy suggested most of the original converted set should move to
> > >     generic fwnode / property.h handling.  Within IIO that was
> > >     a reasonable observation given we've been trying to move away from
> > >     firmware specific handling for some time. Patches making that change
> > >     to appropriate drivers posted.
> > >     As we discussed there are cases which are not suitable for such
> > >     conversion and this infrastructure still provides clear benefits
> > >     for them.
> >
> > >   iio: adc: rcar-gyroadc: use for_each_available_child_node_scoped()
> >
> > Is this the only one so far? Or do we have more outside of IIO?
> >
> > I'm fine with the code if OF maintainers think it's useful.
> > My concern is to make as many as possible drivers to be converted to
> > use fwnode instead of OF one.
> >
> Julia wrote a coccinelle script
> __free() cases
> https://lore.kernel.org/all/alpine.DEB.2.22.394.2401291455430.8649@hadrien/

The script doesn't use fwnode.  It gets rid of of_node_put, asssuming that
someone has already set that up for __free.

julia