shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-10 12:57:06 +09:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
commit d3ad9373b7 upstream.

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Joerg Roedel
2010-02-03 16:13:41 +01:00
committed by Greg Kroah-Hartman
parent 16ecf8a237
commit 314a4e5441
1 changed files with 3 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kernel/amd_iommu.c
View File

@@ -1230,9 +1230,10 @@ static void __detach_device(struct protection_domain *domain, u16 devid)
/*
* 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) {
if (iommu_pass_through && domain != pt_domain) {
struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
__attach_device(iommu, pt_domain, devid);
}