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Commit d3ad9373 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Fix deassignment of a device from the pt_domain 



Deassigning a device from the passthrough domain does not
work and breaks device assignment to kvm guests. This patch
fixes the issue.

Cc: stable@kernel.org
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent f5325094

arch/x86/kernel/amd_iommu.c

+4 −2
Original line number Diff line number Diff line
@@ -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);

}