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| author |  Vasant Hegde <vasant.hegde@amd.com>
| 2023-02-15 05:26:41 +0000 |
|---|---|---|
| committer |  Joerg Roedel <jroedel@suse.de>
| 2023-02-18 15:36:33 +0100 |
| commit | f451c7a5a3b818ecfeba2ba258570769998baf3a (patch) | |
| tree | 193e1d0f360aa18ef814086a58a18acaf7b0a731 /drivers/iommu/amd | |
| parent | iommu/amd: Improve page fault error reporting (diff) | |
| download | linux-f451c7a5a3b818ecfeba2ba258570769998baf3a.tar.gz linux-f451c7a5a3b818ecfeba2ba258570769998baf3a.tar.bz2 linux-f451c7a5a3b818ecfeba2ba258570769998baf3a.zip | |
iommu/amd: Skip attach device domain is same as new domain
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>
Diffstat (limited to 'drivers/iommu/amd')
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index f97c0bf930a7..2aff392d9895 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -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) |