linux-kernel - Re: [PATCH v3 2/5] iommu: Pass in gdev to __iommu_device_set

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Message-ID: <a9cc9b2c-71fa-4ee8-a82e-3254588cf964@linux.intel.com>
Date: Fri, 15 Aug 2025 13:18:20 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: Nicolin Chen <nicolinc@...dia.com>, robin.murphy@....com,
 joro@...tes.org, bhelgaas@...gle.com, jgg@...dia.com
Cc: will@...nel.org, robin.clark@....qualcomm.com, yong.wu@...iatek.com,
 matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
 thierry.reding@...il.com, vdumpa@...dia.com, jonathanh@...dia.com,
 rafael@...nel.org, lenb@...nel.org, kevin.tian@...el.com,
 yi.l.liu@...el.com, linux-arm-kernel@...ts.infradead.org,
 iommu@...ts.linux.dev, linux-kernel@...r.kernel.org,
 linux-arm-msm@...r.kernel.org, linux-mediatek@...ts.infradead.org,
 linux-tegra@...r.kernel.org, linux-acpi@...r.kernel.org,
 linux-pci@...r.kernel.org, patches@...ts.linux.dev, pjaroszynski@...dia.com,
 vsethi@...dia.com, helgaas@...nel.org, etzhao1900@...il.com
Subject: Re: [PATCH v3 2/5] iommu: Pass in gdev to __iommu_device_set_domain

On 8/12/25 06:59, Nicolin Chen wrote:
> The device under the reset will be attached to a blocked domain, while not
> updating the group->domain pointer. So there needs to be a per-device flag
> to indicate the reset state, for other iommu core functions to check so as
> not to shift the attached domain during the reset state.
> 
> The regular device pointer can't store any private any private iommu flag.
> So, the flag has to be in the gdev structure.
> 
> Pass in the gdev pointer instead to the functions that will check that per
> device flag.
> 
> Reviewed-by: Jason Gunthorpe<jgg@...dia.com>
> Signed-off-by: Nicolin Chen<nicolinc@...dia.com>

Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>