linux-kernel - Re: [PATCH RFC 4/7] genirq/msi: Make the .prepare callback reusable

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Date:	Fri, 16 Oct 2015 13:45:04 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Marc Zyngier <marc.zyngier@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Cc:	Ma Jun <majun258@...wei.com>, linux-arm-kernel@...ts.infradead.org,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 4/7] genirq/msi: Make the .prepare callback reusable

On 2015/10/15 23:39, Marc Zyngier wrote:
<snit>
> +int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
> +			    int nvec, msi_alloc_info_t *arg)
> +{
> +	struct msi_domain_info *info = domain->host_data;
> +	struct msi_domain_ops *ops = info->ops;
> +	int ret;
> +
> +	ret = ops->msi_check(domain, info, dev);
> +	if (ret == 0)
> +		ret = ops->msi_prepare(domain, dev, nvec, arg);
> +	if (ret)
> +		return ret;
> +
> +	return 0;
Seems a simple "return ret" is enough:)
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