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-rw-r--r--arch/x86/kernel/amd_iommu.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 751ce73..adb0ba0 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1511,9 +1511,11 @@ static void __detach_device(struct device *dev)
/*
* If we run in passthrough mode the device must be assigned to the
- * passthrough domain if it is detached from any other domain
+ * passthrough domain if it is detached from any other domain.
+ * Make sure we can deassign from the pt_domain itself.
*/
- if (iommu_pass_through && dev_data->domain == NULL)
+ if (iommu_pass_through &&
+ (dev_data->domain == NULL && domain != pt_domain))
__attach_device(dev, pt_domain);
}