SUME_MSI_TXBUF
while ((vect & (SUME_MSI_TXBUF | SUME_MSI_TXDONE)) &&
if (!(vect & SUME_MSI_TXBUF)) {
vect &= ~SUME_MSI_TXBUF;
if ((vect & (SUME_MSI_TXBUF | SUME_MSI_TXDONE)) &&