WPI_MAX_SCATTER
WPI_MAX_SCATTER - 1, MCLBYTES, 0, &ring->data_dmat);
WPI_MAX_SCATTER - 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
bus_dma_segment_t *seg, segs[WPI_MAX_SCATTER];
m1 = m_collapse(buf->m, M_NOWAIT, WPI_MAX_SCATTER - 1);
KASSERT(nsegs < WPI_MAX_SCATTER,
nsegs, WPI_MAX_SCATTER));
} __packed segs[WPI_MAX_SCATTER];