linux-kernel - Re: [PATCH] iommu: Use dev_iommu_ops() for probe

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Date:   Fri, 22 Apr 2022 20:57:31 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Robin Murphy <robin.murphy@....com>, joro@...tes.org,
        will@...nel.org
Cc:     baolu.lu@...ux.intel.com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iommu: Use dev_iommu_ops() for probe_finalize

On 2022/4/22 20:33, Robin Murphy wrote:
> The ->probe_finalize hook only runs after ->probe_device succeeds,
> so we can move that over to the new dev_iommu_ops() as well.
> 
> Signed-off-by: Robin Murphy <robin.murphy@....com>

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

Best regards,
baolu

> ---
> 
> Another cheeky little one which doesn't need to wait...
> 
>   drivers/iommu/iommu.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
> index 1b8dcda5fbe4..8825a4628e46 100644
> --- a/drivers/iommu/iommu.c
> +++ b/drivers/iommu/iommu.c
> @@ -315,7 +315,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list
>   
>   int iommu_probe_device(struct device *dev)
>   {
> -	const struct iommu_ops *ops = dev->bus->iommu_ops;
> +	const struct iommu_ops *ops;
>   	struct iommu_group *group;
>   	int ret;
>   
> @@ -352,6 +352,7 @@ int iommu_probe_device(struct device *dev)
>   	mutex_unlock(&group->mutex);
>   	iommu_group_put(group);
>   
> +	ops = dev_iommu_ops(dev);
>   	if (ops->probe_finalize)
>   		ops->probe_finalize(dev);
>