[PATCH] amd-iommu: detach device explicitly before attaching it to a new domain
Chris Wright
chrisw at sous-sol.org
Mon Jun 8 13:47:33 PDT 2009
From: Joerg Roedel <joerg.roedel at amd.com>
This fixes a bug with a device that could not be assigned to a KVM guest
because it is still assigned to a dma_ops protection domain.
[chrisw: simply remove WARN_ON(), will always fire since dev->driver
will be pci-sub]
Signed-off-by: Chris Wright <chrisw at sous-sol.org>
---
arch/x86/kernel/amd_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1842,7 +1842,7 @@ static int amd_iommu_attach_device(struc
old_domain = domain_for_device(devid);
if (old_domain)
- return -EBUSY;
+ detach_device(old_domain, devid);
attach_device(iommu, domain, devid);
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