[PULL v3 08/32] virtio-pci: disable vring processing when bus-mastering is disabled

2020-01-07 Thread Michael S. Tsirkin
From: Michael Roth Currently the SLOF firmware for pseries guests will disable/re-enable a PCI device multiple times via IO/MEM/MASTER bits of PCI_COMMAND register after the initial probe/feature negotiation, as it tends to work with a single device at a time at various stages like probing and ru

[PULL v3 08/32] virtio-pci: disable vring processing when bus-mastering is disabled

2020-01-05 Thread Michael S. Tsirkin
From: Michael Roth Currently the SLOF firmware for pseries guests will disable/re-enable a PCI device multiple times via IO/MEM/MASTER bits of PCI_COMMAND register after the initial probe/feature negotiation, as it tends to work with a single device at a time at various stages like probing and ru