Re: [PATCH v4 2/5] irqchip/imx-irqsteer: Use devm to manage the IRQ domain

[Frank Li]

On Wed, Aug 19, 2026 at 06:05:40PM +0900, Zhipeng.wang_1@xxxxxxxxxxx wrote:
> From: Zhipeng Wang <zhipeng.wang_1@xxxxxxx>
>
> probe() creates the IRQ domain with irq_domain_create_linear() and only
> tears it down on the remove() path. On the probe() error path after the
> domain has been created (the fsl,num-irqs sanity check), the single
> error label just calls clk_disable_unprepare() and returns, leaking the
> freshly created domain. The domain-creation failure path happens to
> share the same label correctly only because the domain is NULL there.
>
> Create the domain with the new devm_irq_domain_create_linear() so the
> domain is removed automatically on unbind and on any probe() failure
> after it has been created. This fixes the leak on the sanity-check error
> path and lets remove() drop its explicit irq_domain_remove().
>
> Fixes: 28528fca4908 ("irqchip/imx-irqsteer: Add multi output interrupts support")

Nit: First patch also need fixes tags to backport.

Reviewed-by: Frank Li <Frank.Li@xxxxxxx>

> Signed-off-by: Zhipeng Wang <zhipeng.wang_1@xxxxxxx>
> ---
>  drivers/irqchip/irq-imx-irqsteer.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
> index 87b07f517be3..359b8ebc1bae 100644
> --- a/drivers/irqchip/irq-imx-irqsteer.c
> +++ b/drivers/irqchip/irq-imx-irqsteer.c
> @@ -236,8 +236,9 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
>  	if (irqsteer_has_chanctrl(data->devtype_data))
>  		writel_relaxed(BIT(data->channel), data->regs + CHANCTRL);
>
> -	data->domain = irq_domain_create_linear(dev_fwnode(&pdev->dev), data->reg_num * 32,
> -						&imx_irqsteer_domain_ops, data);
> +	data->domain = devm_irq_domain_create_linear(&pdev->dev, dev_fwnode(&pdev->dev),
> +						     data->reg_num * 32,
> +						     &imx_irqsteer_domain_ops, data);
>  	if (!data->domain) {
>  		dev_err(&pdev->dev, "failed to create IRQ domain\n");
>  		ret = -ENOMEM;
> @@ -284,8 +285,6 @@ static void imx_irqsteer_remove(struct platform_device *pdev)
>  						 NULL, NULL);
>  	}
>
> -	irq_domain_remove(irqsteer_data->domain);
> -
>  	clk_disable_unprepare(irqsteer_data->ipg_clk);
>  }
>
> --
> 2.34.1
>
>