RE: [PATCH 1/4] iommu/vt-d: Introduce dev_to_iommu()

[Tian, Kevin]

> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Thursday, November 16, 2023 9:51 AM
> 
> +static inline struct intel_iommu *dev_to_iommu(struct device *dev)
> +{
> +	/*
> +	 * Assume that valid per-device iommu structure must be installed
> +	 * if iommu_probe_device() has succeeded. This helper could only
> +	 * be used after device is probed.
> +	 */
> +	return ((struct device_domain_info *)dev_iommu_priv_get(dev))-
> >iommu;
> +}

Not sure whether this helper is useful. This is only used by 2 out of 5
post-probe users. Probably just open-coding in all 5 places is clearer.