RING_BD_SIZE
if (write_offset == RING_BD_SIZE)
ring->bd_base, ring->bd_base + RING_BD_SIZE);
for (off = 0; off < RING_BD_SIZE; off += RING_DESC_SIZE) {
if (next_addr == RING_BD_SIZE)
mbox->bd_pool = dma_pool_create("bd", dev, RING_BD_SIZE,
(u32)RING_BD_SIZE,