Device not assignable error when passing a PCI device to a KVM virtual guest

Solution Verified - Updated -

Issue

  • Attempting to pass a PCI device to a KVM guest and getting an error similar to the following:
Error starting domain: 
Requested operation is not valid:
PCI device $device_address is not assignable

Environment

  • Red Hat Enterprise Linux 6 KVM Hypervisor
  • KVM guest using a passthrough device

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