static int arm_mbo_chain()

in core.c [872:919]

• 42 lines of code
• 6 McCabe index (conditional complexity)

static int arm_mbo_chain(struct most_channel *c, int dir,
			 void (*compl)(struct mbo *))
{
	unsigned int i;
	struct mbo *mbo;
	unsigned long flags;
	u32 coherent_buf_size = c->cfg.buffer_size + c->cfg.extra_len;

	atomic_set(&c->mbo_nq_level, 0);

	for (i = 0; i < c->cfg.num_buffers; i++) {
		mbo = kzalloc(sizeof(*mbo), GFP_KERNEL);
		if (!mbo)
			goto flush_fifos;

		mbo->context = c;
		mbo->ifp = c->iface;
		mbo->hdm_channel_id = c->channel_id;
		if (c->iface->dma_alloc) {
			mbo->virt_address =
				c->iface->dma_alloc(mbo, coherent_buf_size);
		} else {
			mbo->virt_address =
				kzalloc(coherent_buf_size, GFP_KERNEL);
		}
		if (!mbo->virt_address)
			goto release_mbo;

		mbo->complete = compl;
		mbo->num_buffers_ptr = &dummy_num_buffers;
		if (dir == MOST_CH_RX) {
			nq_hdm_mbo(mbo);
			atomic_inc(&c->mbo_nq_level);
		} else {
			spin_lock_irqsave(&c->fifo_lock, flags);
			list_add_tail(&mbo->list, &c->fifo);
			spin_unlock_irqrestore(&c->fifo_lock, flags);
		}
	}
	return c->cfg.num_buffers;

release_mbo:
	kfree(mbo);

flush_fifos:
	flush_channel_fifos(c);
	return 0;
}