linux-kernel - Re: [PATCH 01/13] media: vsp1: Use platform_get

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Date:   Thu, 30 Dec 2021 02:06:29 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     linux-media@...r.kernel.org,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH 01/13] media: vsp1: Use platform_get_irq() to get the
 interrupt

Hi Prabhakar,

Thank you for the patch.

On Thu, Dec 23, 2021 at 05:30:02PM +0000, Lad Prabhakar 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>

Will you get this merged with the whole series, or should I take it in
my tree ?

> ---
>  drivers/media/platform/vsp1/vsp1_drv.c | 13 +++++--------
>  1 file changed, 5 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/media/platform/vsp1/vsp1_drv.c b/drivers/media/platform/vsp1/vsp1_drv.c
> index c9044785b903..bbba91a65a0f 100644
> --- a/drivers/media/platform/vsp1/vsp1_drv.c
> +++ b/drivers/media/platform/vsp1/vsp1_drv.c
> @@ -794,7 +794,6 @@ static int vsp1_probe(struct platform_device *pdev)
>  {
>  	struct vsp1_device *vsp1;
>  	struct device_node *fcp_node;
> -	struct resource *irq;
>  	unsigned int i;
>  	int ret;
>  
> @@ -813,14 +812,12 @@ static int vsp1_probe(struct platform_device *pdev)
>  	if (IS_ERR(vsp1->mmio))
>  		return PTR_ERR(vsp1->mmio);
>  
> -	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -	if (!irq) {
> -		dev_err(&pdev->dev, "missing IRQ\n");
> -		return -EINVAL;
> -	}
> +	ret = platform_get_irq(pdev, 0);
> +	if (ret < 0)
> +		return ret;

I'd use an int irq local variable, but it doesn't matter much. Up to
you.

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

>  
> -	ret = devm_request_irq(&pdev->dev, irq->start, vsp1_irq_handler,
> -			      IRQF_SHARED, dev_name(&pdev->dev), vsp1);
> +	ret = devm_request_irq(&pdev->dev, ret, vsp1_irq_handler,
> +			       IRQF_SHARED, dev_name(&pdev->dev), vsp1);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "failed to request IRQ\n");
>  		return ret;

-- 
Regards,

Laurent Pinchart