linux-kernel - Re: [PATCH v4] soc: ti: smartreflex: Use platform_get_irq

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Message-ID: <CA+V-a8uduHrVr4HWAgPt3YP_g27xhi4FdsrANn9S5mY0TBSvbg@mail.gmail.com>
Date:   Tue, 4 Jan 2022 15:05:12 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Nishanth Menon <nm@...com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4] soc: ti: smartreflex: Use platform_get_irq_optional()
 to get the interrupt

On Tue, Jan 4, 2022 at 2:50 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Tue, Jan 4, 2022 at 3:45 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> >
> > platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> > allocation of IRQ resources in DT core code, this causes an issue
> > when using hierarchical interrupt domains using "interrupts" property
> > in the node as this bypasses the hierarchical setup and messes up the
> > irq chaining.
> >
> > In preparation for removal of static setup of IRQ resource from DT core
> > code use platform_get_irq_optional().
> >
> > While at it return 0 instead of returning ret in the probe success path.
>
> ...
>
> > +       ret = platform_get_irq_optional(pdev, 0);
> > +       if (ret < 0 && ret != -ENXIO) {
>
> > +               dev_err_probe(&pdev->dev, ret, "%s: failed to get IRQ resource\n", __func__);
> > +               return ret;
>
> return dev_err_probe(...); ?
>
Argh my bad.

Cheers,
Prabhakar