Re: [PATCH 1/5] vsock/virtio: support for SOCK_SEQPACKET socket.

IMHO you can avoid this special-casing
by introducing yet another outer loop just
for draining the extra data from buffer.
Admittedly that may also require an extra
transport op.

I'm not sure that extra tranport op is needed, may be i'll
try to put drain code inside copy loop, because only
difference is that copy length is 0.

Why do you need this change?
(maybe its ok, just wondering)

No need to reset here, like a few lines
above in a seemingly similar condition?

Yes, i think you are right.