ixgbe_alloc_rx_buffers
void ixgbe_alloc_rx_buffers(struct ixgbe_ring *, u16);
ixgbe_alloc_rx_buffers(rx_ring, count);
ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));