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iommu: Fix ATS invalidation timeouts during __iommu_remove_group_pasid()

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If a device is blocked, its PASID domains are already detached. Repeating
iommu_remove_dev_pasid() is unnecessary and might trigger ATS invalidation
timeouts.

Skip the iommu_remove_dev_pasid() call upon gdev->blocked.

Fixes: c279e83953 ("iommu: Introduce pci_dev_reset_iommu_prepare/done()")
Cc: stable@vger.kernel.org
Closes: https://sashiko.dev/#/patchset/20260407194644.171304-1-nicolinc%40nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Nicolin Chen
2026-04-24 18:15:25 -07:00
committed by Joerg Roedel
parent 0d5fd7a932
commit fc3523b16d
1 changed files with 6 additions and 1 deletions
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7
drivers/iommu/iommu.c
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@@ -3602,7 +3602,12 @@ static void __iommu_remove_group_pasid(struct iommu_group *group,
struct group_device *device;
for_each_group_device(group, device) {
if (device->dev->iommu->max_pasids > 0)
/*
* A group-level detach cannot fail, even if there is a blocked
* device. In fact, blocked devices must be already detached for
* a pending device recovery.
*/
if (!device->blocked && device->dev->iommu->max_pasids > 0)
iommu_remove_dev_pasid(device->dev, pasid, domain);
}
}