linux-kernel - Re: [PATCH v3 10/16] iommu: introduce device fault report API

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Message-ID: <f612ccea-fd59-38d5-0d16-465645f3b443@arm.com>
Date:   Wed, 10 Jan 2018 12:39:59 +0000
From:   Jean-Philippe Brucker <jean-philippe.brucker@....com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rafael Wysocki <rafael.j.wysocki@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>
Cc:     Lan Tianyu <tianyu.lan@...el.com>,
        Jean Delvare <khali@...ux-fr.org>
Subject: Re: [PATCH v3 10/16] iommu: introduce device fault report API

On 17/11/17 18:55, Jacob Pan wrote:
[...]
> +static inline int iommu_register_device_fault_handler(struct device *dev,
> +						iommu_dev_fault_handler_t handler,
> +						void *data)
> +{
> +	return 0;> +}
> +
> +static inline int iommu_unregister_device_fault_handler(struct device *dev)
> +{
> +	return 0;
> +}
> +
> +static inline bool iommu_has_device_fault_handler(struct device *dev)
> +{
> +	return false;
> +}
> +
> +static inline int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
> +{
> +	return 0;
> +}

Not too important but these stubs, when CONFIG_IOMMU_API is disabled,
usually return an error value (-ENODEV) instead of 0.

Thanks,
Jean

> +
>  static inline int iommu_group_id(struct iommu_group *group)
>  {
>  	return -ENODEV;
>