linux-kernel - Re: [PATCH 06/13] media: davinci: vpif: Use platform_get_irq

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Message-ID: <CA+V-a8uRqfs2h82_y6yk7MZnt8K5iKii5DZZpFgDDy0Hw2ieXA@mail.gmail.com>
Date:   Wed, 5 Jan 2022 17:41:04 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Rob Herring <robh+dt@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH 06/13] media: davinci: vpif: Use platform_get_irq_optional()
 to get the interrupt

Hi Andy,

On Wed, Jan 5, 2022 at 9:43 AM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Tue, Jan 4, 2022 at 7:23 PM Lad, Prabhakar
> <prabhakar.csengg@...il.com> wrote:
> > On Sat, Dec 25, 2021 at 5:32 PM Andy Shevchenko
> > <andy.shevchenko@...il.com> wrote:
> > > On Sat, Dec 25, 2021 at 3:04 AM Lad Prabhakar
> > > <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
>
> ...
>
> > > > +       res_irq->flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
> > > > +       res_irq->start = irq;
> > > > +       res_irq->end = irq;
> > > > +       res_irq->name = dev_of_node(&pdev->dev) ? of_node_full_name(pdev->dev.of_node) : NULL;
> > >
> > > If you convert DEFINE_RES_NAMED() to return a compound literal, then
> > > you may use it here like
> > >
> > > res_irq = DEFINE_RES_NAMED(...);
> > >
> > > or even do like this
> > >
> > > if (dev_of_node(...))
> > >   res_irq = DEFINE_RES_IRQ_NAMED(...)
> > > else
> > >   res_irq = DEFINE_RES_IRQ(...);
> > > res_irq->flags |= irq_get_trigger_type(irq);
> > >
> > There are quite a few users of DEFINE_RES_IRQ_NAMED()/DEFINE_RES_IRQ()
> > changing this macos just for this single user tree wide doesn't make
> > sense. Let me know if you think otherwise.
>
> Converting them to produce compound literal is straightforward and
> does not require changes in the users. But on the other hand it allows
> you to use it and convert existing users to use that form directly.
> You may conduct research on how macros in the property.h were morphing
> towards that.
>
Thank you for the pointer. I did the below change for this.

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 8359c50f9988..da1208e8f164 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -153,7 +153,7 @@ enum {

 /* helpers to define resources */
 #define DEFINE_RES_NAMED(_start, _size, _name, _flags)                 \
-       {                                                               \
+       (struct resource) {                                     \
                .start = (_start),                                      \
                .end = (_start) + (_size) - 1,                          \
                .name = (_name),                                        \

But there are some instances which need to be touched, for example
vexpress-sysreg.c [1]. Are you OK with files to be changed?

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/mfd/vexpress-sysreg.c?h=v5.16-rc8#n65

Cheers,
Prabhakar