[Qemu-devel] [PATCH 0/3] Introduce virtqueue_get_avail_bytes()

[Amit Shah <amit.shah@redhat.com>]

The current virtqueue_avail_bytes() is a weird API: it's oddly-named:
doesn't tell us what the API is going to do, and also suits just one
use-case (that in virtio-net.c).

Introduce virtqueue_get_avail_bytes(), which returns the number of
bytes in the vq available for input as well as output.
virtqueue_avail_bytes() is made a wrapper around this new function for
now.  It should be deprecated soon, though.

Doing this will also help with the virtio-rng patch where a
VirtQueueElement is popped only to find out what its size is.  With
this series applied, the popping (and the subsequent save/load of
state for migration) isn't necessary.

The virtio-serial-bus code becomes better too, that's patch 3 here.

Please apply,

Amit Shah (3):
  virtio: use unsigned int for counting bytes in vq
  virtio: Introduce virtqueue_get_avail_bytes()
  virtio-serial-bus: let chardev know the exact number of bytes
    requested

 hw/virtio-serial-bus.c |   11 +++--------
 hw/virtio.c            |   30 ++++++++++++++++++++++--------
 hw/virtio.h            |    5 ++++-
 3 files changed, 29 insertions(+), 17 deletions(-)

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1.7.7.6