linux-kernel - Re: [PATCH 5/8] irqchip/loongson-pch-lpc: add OF init code

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Message-ID: <87v7ggfnby.ffs@tglx>
Date: Sun, 01 Feb 2026 17:19:45 +0100
From: Thomas Gleixner <tglx@...nel.org>
To: Icenowy Zheng <zhengxingda@...as.ac.cn>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
 Huacai Chen <chenhuacai@...nel.org>, Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-mips@...r.kernel.org, Icenowy Zheng <zhengxingda@...as.ac.cn>
Subject: Re: [PATCH 5/8] irqchip/loongson-pch-lpc: add OF init code

On Sat, Jan 31 2026 at 17:45, Icenowy Zheng wrote:

> As the (kernel-internally) OF-based MIPS Loongson-3 systems can also

What are kernel-internally systems?

> have PCH LPC interrupt controller, add OF-based initialization code for

have a ... controller.

Add OF ....

> +#ifdef CONFIG_OF
> +static int pch_lpc_of_init(struct device_node *node,
> +				struct device_node *parent)

No line break required.

> +{
> +	int parent_irq;
> +	struct fwnode_handle *irq_handle;
> +	struct resource res;

Variable ordering.

> +	if (of_address_to_resource(node, 0, &res))
> +		return -EINVAL;
> +
> +	parent_irq = irq_of_parse_and_map(node, 0);
> +	if (!parent_irq) {
> +		pr_err("Failed to get the parent IRQ for LPC IRQs\n");
> +		return -EINVAL;
> +	}
> +
> +	irq_handle = of_fwnode_handle(node);
> +
> +	return pch_lpc_init(res.start, resource_size(&res), irq_handle,
> +			    parent_irq);

If pch_lpc_init() fails the parent interrupt mapping is leaked, no?

Thanks,

        tglx