static int svc_i3c_master_send_direct_ccc_cmd()

in master/svc-i3c-master.c [1200:1246]

• 37 lines of code
• 7 McCabe index (conditional complexity)

static int svc_i3c_master_send_direct_ccc_cmd(struct svc_i3c_master *master,
					      struct i3c_ccc_cmd *ccc)
{
	unsigned int xfer_len = ccc->dests[0].payload.len;
	unsigned int read_len = ccc->rnw ? xfer_len : 0;
	struct svc_i3c_xfer *xfer;
	struct svc_i3c_cmd *cmd;
	int ret;

	xfer = svc_i3c_master_alloc_xfer(master, 2);
	if (!xfer)
		return -ENOMEM;

	xfer->type = SVC_I3C_MCTRL_TYPE_I3C;

	/* Broadcasted message */
	cmd = &xfer->cmds[0];
	cmd->addr = I3C_BROADCAST_ADDR;
	cmd->rnw = 0;
	cmd->in = NULL;
	cmd->out = &ccc->id;
	cmd->len = 1;
	cmd->read_len = 0;
	cmd->continued = true;

	/* Directed message */
	cmd = &xfer->cmds[1];
	cmd->addr = ccc->dests[0].addr;
	cmd->rnw = ccc->rnw;
	cmd->in = ccc->rnw ? ccc->dests[0].payload.data : NULL;
	cmd->out = ccc->rnw ? NULL : ccc->dests[0].payload.data,
	cmd->len = xfer_len;
	cmd->read_len = read_len;
	cmd->continued = false;

	svc_i3c_master_enqueue_xfer(master, xfer);
	if (!wait_for_completion_timeout(&xfer->comp, msecs_to_jiffies(1000)))
		svc_i3c_master_dequeue_xfer(master, xfer);

	if (cmd->read_len != xfer_len)
		ccc->dests[0].payload.len = cmd->read_len;

	ret = xfer->ret;
	svc_i3c_master_free_xfer(xfer);

	return ret;
}