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iommu/amd: Skip attach device domain is same as new domain

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If device->domain is same as new domain then we can skip the
device attach process.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20230215052642.6016-2-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Vasant Hegde 2023-02-15 05:26:41 +00:00 committed by Joerg Roedel
parent 996d120b4d
commit f451c7a5a3
1 changed files with 7 additions and 0 deletions
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7
drivers/iommu/amd/iommu.c
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@ -2184,6 +2184,13 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
struct amd_iommu *iommu = rlookup_amd_iommu(dev);
int ret;
/*
* Skip attach device to domain if new domain is same as
* devices current domain
*/
if (dev_data->domain == domain)
return 0;
dev_data->defer_attach = false;
if (dev_data->domain)