Merge branch 'vsock-pkt-cancel'

Peng Tao says:

====================
vsock: cancel connect packets when failing to connect

Currently, if a connect call fails on a signal or timeout (e.g., guest is still
in the process of starting up), we'll just return to caller and leave the connect
packet queued and they are sent even though the connection is considered a failure,
which can confuse applications with unwanted false connect attempt.

The patchset enables vsock (both host and guest) to cancel queued packets when
a connect attempt is considered to fail.

v5 changelog:
  - change virtio_vsock_pkt->cancel_token back to virtio_vsock_pkt->vsk
v4 changelog:
  - drop two unnecessary void * cast
  - update new callback comment
v3 changelog:
  - define cancel_pkt callback in struct vsock_transport rather than struct virtio_transport
  - rename virtio_vsock_pkt->vsk to virtio_vsock_pkt->cancel_token
v2 changelog:
  - fix queued_replies counting and resume tx/rx when necessary
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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