vdpa/virtio: Fix virtio_vdpa_virtq_doorbell_relay_disable crash #38
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When MSIX configured less then queue number, quit testpmd in VM, cause vDPA crash.
When callfd == -1, virtio_pci_dev_interrupt_enable is skipped. But in virtio_vdpa_virtq_disable, no such check to skip virtio_pci_dev_interrupt_disable. virtio_vdpa_virtq_disable return error without changing queue state to disable. Double free is caused by this wrong queue state.
The fix is to add/check vector_enable variable for virtio_pci_dev_interrupt_disable. And remove error return in virtio_vdpa_virtq_disable.
RM: 3587409