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It looks like there's no need for those two fields:
- Unless there's a failure for the first refill try, rq->max should be always
equal to the vring size.
- rq->num is only used to determine the condition that we need to do the refill,
we could check vq->num_free instead.
- rq->num was required to be increased or decreased explicitly after each
get/put which results a bad API.
So this patch removes them both to make the code simpler.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
be121f46af