MESH_FIFO_COUNT
fifocnt = mesh_read_reg(sc, MESH_FIFO_COUNT);
if (mesh_read_reg(sc, MESH_FIFO_COUNT) == 0) { /* XXX cheat */
if (mesh_read_reg(sc, MESH_FIFO_COUNT) != 0)
DPRINTF("FIFO_COUNT=%d\n", mesh_read_reg(sc, MESH_FIFO_COUNT));
if (mesh_read_reg(sc, MESH_FIFO_COUNT) == 0) { /* XXX cheat */
while (mesh_read_reg(sc, MESH_FIFO_COUNT) > 0);