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Date: Fri, 18 Dec 2020 18:59:19 +0000 From: Marc Zyngier <maz@...nel.org> To: Christophe JAILLET <christophe.jaillet@...adoo.fr> Cc: tglx@...utronix.de, mripard@...nel.org, dan.carpenter@...cle.com, linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org Subject: Re: [PATCH] irqdomain: Add documentation for irq_create_of_mapping() Hi Christophe, On Tue, 15 Dec 2020 20:07:47 +0000, Christophe JAILLET <christophe.jaillet@...adoo.fr> wrote: > > Add a description for 'irq_create_of_mapping()' and make explicit the fact > that the resources allocated by this function can be freed by calling > 'irq_dispose_mapping()' when needed (i.e. error handling path, remove > function, ...) > > Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr> > --- > The wording can certainly be improved. > > My goal is only to make clear if patches such as: > https://lore.kernel.org/lkml/20201214202117.146293-1-christophe.jaillet@wanadoo.fr/ > are needed or not. > --- > kernel/irq/irqdomain.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c > index 6aacd342cd14..d761ece8d43e 100644 > --- a/kernel/irq/irqdomain.c > +++ b/kernel/irq/irqdomain.c > @@ -858,6 +858,15 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec) > } > EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping); > > +/** > + * irq_create_of_mapping() - Map an interrupt I think this deserves a bit more work. My immediate questions when reading this are "map where? and to what?". > + * @irq_data: structure of_phandle_args returned by a previous > + * of_irq_parse_xxx() call That's not strictly true. A of_phandle_args structure can be created from scratch (and numerous drivers do that). > + * > + * The resources allocated by this function should be freed by > + * calling irq_dispose_mapping() when the mapping if not useful > + * anymore. This really is a bit of documentation for irq_dispose_mapping(), isn't it? > + */ > unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) > { > struct irq_fwspec fwspec; Thanks, M. -- Without deviation from the norm, progress is not possible.
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