linux-kernel - Re: [PATCH] platform: goldfish: pipe: Use platform_get

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Date:   Wed, 9 Mar 2022 12:09:45 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH] platform: goldfish: pipe: Use platform_get_irq() to get
 the interrupt

Hi Greg,

I'm not sure how I missed you to add in the to list.

On Fri, Dec 24, 2021 at 4:13 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().
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
> Hi,
>
> Dropping usage of platform_get_resource() was agreed based on
> the discussion [0].
>
> [0] https://patchwork.kernel.org/project/linux-renesas-soc/
> patch/20211209001056.29774-1-prabhakar.mahadev-lad.rj@...renesas.com/
>
> Cheers,
> Prabhakar
> ---
>  drivers/platform/goldfish/goldfish_pipe.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
Do you want me to resend this patch?

Cheers,
Prabhakar

> diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c
> index b67539f9848c..7737d56191d7 100644
> --- a/drivers/platform/goldfish/goldfish_pipe.c
> +++ b/drivers/platform/goldfish/goldfish_pipe.c
> @@ -896,11 +896,9 @@ static int goldfish_pipe_probe(struct platform_device *pdev)
>                 return -EINVAL;
>         }
>
> -       r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -       if (!r)
> -               return -EINVAL;
> -
> -       dev->irq = r->start;
> +       dev->irq = platform_get_irq(pdev, 0);
> +       if (dev->irq < 0)
> +               return dev->irq;
>
>         /*
>          * Exchange the versions with the host device
> --
> 2.17.1
>