linux-kernel - Re: [PATCH 09/12] iommu/vt-d: Check device list of domain in domain free path

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Message-ID: <20220527150527.GU1343366@nvidia.com>
Date:   Fri, 27 May 2022 12:05:27 -0300
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>,
        Christoph Hellwig <hch@...radead.org>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Liu Yi L <yi.l.liu@...el.com>,
        Jacob jun Pan <jacob.jun.pan@...el.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/12] iommu/vt-d: Check device list of domain in domain
 free path

On Fri, May 27, 2022 at 02:30:16PM +0800, Lu Baolu wrote:
> When the IOMMU domain is about to be freed, it should not be set on any
> device. Instead of silently dealing with some bug cases, it's better to
> trigger a warning to report and fix any potential bugs at the first time.
> 
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
> ---
>  drivers/iommu/intel/iommu.c | 17 ++---------------
>  1 file changed, 2 insertions(+), 15 deletions(-)

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

Jason