[RFC PATCH 00/15] Handle virtio_device_ready() failure

[Xie Yongji]

Now we would trigger a BUG_ON() when we get an invalid status in
virtio_device_ready() during probe and suspend/resume. But
returning invalid status might happen in VDUSE[1] case where
the device becomes untrusted. So this series tries to remove the 
BUG_ON() and return error to the caller so that the device driver
can handle the error correctly.

Now this series is based on my another fix[2].

[1] https://lore.kernel.org/kvm/20210331080519.172-1-xieyongji@xxxxxxxxxxxxx/
[2] https://lore.kernel.org/lkml/20210517083557.172-1-xieyongji@xxxxxxxxxxxxx/

Xie Yongji (15):
  virtio_config: Add return value to virtio_device_ready()
  virtio-blk: Handle virtio_device_ready() failure
  virtio_console: Handle virtio_device_ready() failure
  virtio_crypto: Handle virtio_device_ready() failure
  drm/virtio: Handle virtio_device_ready() failure
  virtio-iommu: Handle virtio_device_ready() failure
  virtio-net: Handle virtio_device_ready() failure
  rpmsg: virtio: Handle virtio_device_ready() failure
  virtio_scsi: Handle virtio_device_ready() failure
  virtio: Handle virtio_device_ready() failure
  virtio-balloon: Handle virtio_device_ready() failure
  virtio-input: Handle virtio_device_ready() failure
  virtio-mem: Handle virtio_device_ready() failure
  virtiofs: Handle virtio_device_ready() failure
  9p/trans_virtio: Handle virtio_device_ready() failure

 drivers/block/virtio_blk.c                 | 13 +++++++++++--
 drivers/char/virtio_console.c              | 14 ++++++++++++--
 drivers/crypto/virtio/virtio_crypto_core.c |  8 ++++++--
 drivers/gpu/drm/virtio/virtgpu_kms.c       |  8 +++++++-
 drivers/iommu/virtio-iommu.c               |  4 +++-
 drivers/net/virtio_net.c                   | 19 +++++++++++++-----
 drivers/rpmsg/virtio_rpmsg_bus.c           | 31 ++++++++++++++++++------------
 drivers/scsi/virtio_scsi.c                 | 13 ++++++++++---
 drivers/virtio/virtio.c                    |  9 +++++++--
 drivers/virtio/virtio_balloon.c            | 13 +++++++++++--
 drivers/virtio/virtio_input.c              | 11 +++++++++--
 drivers/virtio/virtio_mem.c                |  6 +++++-
 fs/fuse/virtio_fs.c                        |  4 +++-
 include/linux/virtio_config.h              |  8 ++++++--
 net/9p/trans_virtio.c                      |  6 +++++-
 15 files changed, 128 insertions(+), 39 deletions(-)

-- 
2.11.0