Function msi_num_enabled_vectors

pci/src/msi.rs:31–39

(msg_ctl: u16)

const MSI_MSG_ADDR_LO_MASK: u32 = 0xffff_fffc;

pub fn msi_num_enabled_vectors(msg_ctl: u16) -> usize {
    let field = (msg_ctl >> 4) & 0x7;

    if field > 5 {
        return 0;
    }

    1 << field
}

#[derive(Error, Debug)]
pub enum Error {