Re: [PATCH v3 1/4] irqchip/imx-irqsteer: Fix error handling path in probe()

[Frank Li]

On Fri, Aug 07, 2026 at 04:23:43PM +0900, Zhipeng.wang_1@xxxxxxxxxxx wrote:
> From: Zhipeng Wang <zhipeng.wang_1@xxxxxxx>
>
> If the fsl,num-irqs sanity check rejects the value after the IRQ domain
> has already been created, probe() jumps to a single label that only calls
> clk_disable_unprepare(), leaving the freshly created IRQ domain leaked.
> The domain-creation failure path shares the same label, which is correct
> only because the domain is NULL there.
>
> Split the error path so that a failure after the domain has been created
> removes it before disabling the clock, and a failure before that goes
> straight to the clock cleanup.
>
> Fixes: 28528fca4908 ("irqchip/imx-irqsteer: Add multi output interrupts support")
> Signed-off-by: Zhipeng Wang <zhipeng.wang_1@xxxxxxx>
> ---
> Changes in v3:
>  - New patch, split out of the single v2 patch. Fixes the irq_domain
>    leak on the probe() error path reported by Sashiko AI on v2.
>
>  drivers/irqchip/irq-imx-irqsteer.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)

I suggest create helper devm_irq_domain_create_leaner()

static inline struct irq_domain *
devm_irq_domain_create_linear(struct fwnode_handle *fwnode,
							  unsigned int size,
							  const struct irq_domain_ops *ops,
							  void *host_data)
{
	const struct irq_domain_info info = {
		.fwnode		= fwnode,
		.size		= size,
		.hwirq_max	= size,
		.ops		= ops,
		.host_data	= host_data,
	};
	struct irq_domain *d = devm_irq_domain_instantiate(&info);

	return IS_ERR(d) ? NULL : d;
}

Then imx-irqsteer this devm version. So other drivers can get beneafit also

Frank


>
> diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
> index 87b07f517be3..a2f0629b22a3 100644
> --- a/drivers/irqchip/irq-imx-irqsteer.c
> +++ b/drivers/irqchip/irq-imx-irqsteer.c
> @@ -241,13 +241,13 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
>  	if (!data->domain) {
>  		dev_err(&pdev->dev, "failed to create IRQ domain\n");
>  		ret = -ENOMEM;
> -		goto out;
> +		goto err_clk;
>  	}
>  	irq_domain_set_pm_device(data->domain, &pdev->dev);
>
>  	if (!data->irq_count || data->irq_count > CHAN_MAX_OUTPUT_INT) {
>  		ret = -EINVAL;
> -		goto out;
> +		goto err_domain;
>  	}
>
>  	for (i = 0; i < data->irq_count; i++) {
> @@ -266,7 +266,10 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
>  	pm_runtime_enable(&pdev->dev);
>
>  	return 0;
> -out:
> +
> +err_domain:
> +	irq_domain_remove(data->domain);
> +err_clk:
>  	clk_disable_unprepare(data->ipg_clk);
>  	return ret;
>  }
> --
> 2.34.1
>
>