virtio-serial: Trivial fixes, don't copy buffers to host

Hi,

This patch series converts virtio-serial-bus to use the guest buffers instead of copying over guest data to the host, as suggested by Paul.

In addition, there are some trivial fixes and code re-arrangement to the virtio-console and virtio-serial code for the upcoming flow control series.

Please apply.

v3:
- Move discard logic to a separate function
- Drop while-loop-rework patch as it's now no longer necessary with the new discard logic

v2:
- drop the erroring out patch till we decide what's to be done
- remove goto usage.

Amit Shah (4):
virtio-console: Factor out common init between console and generic
ports
virtio-console: Remove unnecessary braces
virtio-serial-bus: separate out discard logic in a separate function
virtio-serial: Don't copy over guest buffer to host

 hw/virtio-console.c    |   34 ++++++++++++++------------------
 hw/virtio-serial-bus.c |   50 ++++++++++++++++++++++++++++++-----------------
 2 files changed, 47 insertions(+), 37 deletions(-)

1.7.3.4