When we unbind a device from a driver, we don't properly unlink
the domain from the iommu, so we never free the domain id it
was using. We're typically limited to something like 256 domain
ids, so a loop of unbinding and rebinding a device can exhaust
this pretty quickly. If we're assigning the device to a KVM
guest, libvirt does exactly this each time the device is removed
from the host driver or added back. When we do run out, we oops
the kernel. Fix these. Thanks,
Alex
---
Alex Williamson (2):
intel-iommu: Fix get_domain_for_dev() error path
intel-iommu: Unlink domain from iommu
drivers/pci/intel-iommu.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
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