linux-kernel - Re: [PATCH v2 05/11] iommu/vt-d: Remove DEFER_DEVICE_DOMAIN

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Date:   Thu, 24 Feb 2022 09:04:23 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     Joerg Roedel <joro@...tes.org>, Kevin Tian <kevin.tian@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, Liu Yi L <yi.l.liu@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Robin Murphy <robin.murphy@....com>,
        Christoph Hellwig <hch@....de>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/11] iommu/vt-d: Remove DEFER_DEVICE_DOMAIN_INFO

On Mon, Feb 14, 2022 at 10:56:58AM +0800, Lu Baolu wrote:

> diff --git a/drivers/iommu/intel/debugfs.c b/drivers/iommu/intel/debugfs.c
> index db7a0ca73626..ed796eea4581 100644
> --- a/drivers/iommu/intel/debugfs.c
> +++ b/drivers/iommu/intel/debugfs.c
> @@ -344,7 +344,8 @@ static void pgtable_walk_level(struct seq_file *m, struct dma_pte *pde,
>  
>  static int show_device_domain_translation(struct device *dev, void *data)
>  {
> -	struct dmar_domain *domain = find_domain(dev);
> +	struct device_domain_info *info = dev_iommu_priv_get(dev);
> +	struct dmar_domain *domain = info->domain;

It might be nice to someday call 'struct device_domain_info' something
clearer since it is now the dev_iommu_priv..

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason