Rusty, I have a mind to include this patchset for this merge window. Any input on this? This fixes the following virtio spec compliance issues: 1. on restore, drivers use device before setting ACKNOWLEDGE and DRIVER bits 2. on probe, drivers aren't prepared to handle config interrupts arriving before probe returns 3. on probe, drivers use device before DRIVER_OK it set Note that 1 is a clear violation of virtio spec 0.9 and 1.0, so I am proposing the fix for stable. OTOH 2 is against 1.0 rules but is a known documented bug in many drivers, so let's fix it going forward, but it does not seem to be worth it to backport the changes. An error handling bugfix for virtio-net is also included. 2 is merely a theoretical race condition, but it seems important to address to make sure that changes to address 3 do not introduce instability. Michael S. Tsirkin (15): virtio_pci: fix virtio spec compliance on restore virtio: unify config_changed handling virtio-pci: move freeze/restore to virtio core virtio: defer config changed notifications virtio_blk: drop config_enable virtio-blk: drop config_mutex virtio_net: drop config_enable virtio-net: drop config_mutex virtio_net: minor cleanup virtio: add API to enable VQs early virtio_net: enable VQs early virtio_blk: enable VQs early virtio_console: enable VQs early 9p/trans_virtio: enable VQs early virtio_net: fix use after free on allocation failure include/linux/virtio.h | 14 +++++ include/linux/virtio_config.h | 17 +++++++ drivers/block/virtio_blk.c | 31 ++---------- drivers/char/virtio_console.c | 2 + drivers/misc/mic/card/mic_virtio.c | 6 +-- drivers/net/virtio_net.c | 42 ++++----------- drivers/s390/kvm/kvm_virtio.c | 9 +--- drivers/s390/kvm/virtio_ccw.c | 6 +-- drivers/virtio/virtio.c | 101 +++++++++++++++++++++++++++++++++++++ drivers/virtio/virtio_mmio.c | 7 +-- drivers/virtio/virtio_pci.c | 33 ++---------- net/9p/trans_virtio.c | 2 + 12 files changed, 159 insertions(+), 111 deletions(-) -- MST _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
