write_csr_ring_tail
void (*write_csr_ring_tail)(void __iomem *csr_base_addr, u32 bank,
ops->write_csr_ring_tail(base, bank, rx, state->rings[rx].tail);
ops->write_csr_ring_tail(base, bank, tx, state->rings[tx].tail);
ops->write_csr_ring_tail(base, bank, rx, state->rings[rx].tail);
csr_ops->write_csr_ring_tail = write_csr_ring_tail;
csr_ops->write_csr_ring_tail = write_csr_ring_tail;
csr_ops->write_csr_ring_tail(ring->bank->csr_addr,