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amd-iommu: detach device explicitly before attaching it to a new domain

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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@sous-sol.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-06-08 13:47:33 -07:00
parent 29150078d7
commit 71ff3bca2f
1 changed files with 1 additions and 1 deletions
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arch/x86/kernel/amd_iommu.c
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@ -2073,7 +2073,7 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
old_domain = domain_for_device(devid);
if (old_domain)
return -EBUSY;
detach_device(old_domain, devid);
attach_device(iommu, domain, devid);