static int qcom_smd_channel_recv_single()

in qcom_smd.c [542:571]

• 22 lines of code
• 3 McCabe index (conditional complexity)

static int qcom_smd_channel_recv_single(struct qcom_smd_channel *channel)
{
	struct rpmsg_endpoint *ept = &channel->qsept->ept;
	unsigned tail;
	size_t len;
	void *ptr;
	int ret;

	tail = GET_RX_CHANNEL_INFO(channel, tail);

	/* Use bounce buffer if the data wraps */
	if (tail + channel->pkt_size >= channel->fifo_size) {
		ptr = channel->bounce_buffer;
		len = qcom_smd_channel_peek(channel, ptr, channel->pkt_size);
	} else {
		ptr = channel->rx_fifo + tail;
		len = channel->pkt_size;
	}

	ret = ept->cb(ept->rpdev, ptr, len, ept->priv, RPMSG_ADDR_ANY);
	if (ret < 0)
		return ret;

	/* Only forward the tail if the client consumed the data */
	qcom_smd_channel_advance(channel, len);

	channel->pkt_size = 0;

	return 0;
}