From mboxrd@z Thu Jan  1 00:00:00 1970
From: arnd@arndb.de (Arnd Bergmann)
Date: Thu, 09 Oct 2014 16:37:25 +0200
Subject: [PATCH v3 4/7] ARM: mediatek: Add sysirq interrupt polarity
 support
In-Reply-To: <1412864980-20273-5-git-send-email-yingjoe.chen@mediatek.com>
References: <1412864980-20273-1-git-send-email-yingjoe.chen@mediatek.com>
 <1412864980-20273-5-git-send-email-yingjoe.chen@mediatek.com>
Message-ID: <2076856.iIXavsNzjc@wuerfel>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Thursday 09 October 2014 22:29:37 Joe. C wrote:

> +static int __init mtk_sysirq_of_init(struct device_node *node,
> +				   struct device_node *parent)
> +{
> +	struct device_node *parent_node;
> +	struct irq_domain *domain, *domain_parent = NULL;
> +	struct mt_sysirq_chip_data *chip_data;
> +	int ret = 0;
> +
> +	parent_node = of_irq_find_parent(node);
> +	if (parent_node) {
> +		domain_parent = irq_find_host(parent_node);
> +		of_node_put(parent_node);
> +	}

Just a small comment: I think the 'parent' argument to the function
already contains the device node you are looking up here, so
no need for the second variable or _find_parent call.

This means you can also drop the  = NULL assignment for the
domain.

	Arnd