static int mei_nfc_connect()

in mei_phy.c [139:203]

• 51 lines of code
• 5 McCabe index (conditional complexity)

static int mei_nfc_connect(struct nfc_mei_phy *phy)
{
	struct mei_nfc_cmd *cmd, *reply;
	struct mei_nfc_connect *connect;
	struct mei_nfc_connect_resp *connect_resp;
	size_t connect_length, connect_resp_length;
	int bytes_recv, r;

	connect_length = sizeof(struct mei_nfc_cmd) +
			sizeof(struct mei_nfc_connect);

	connect_resp_length = sizeof(struct mei_nfc_cmd) +
			sizeof(struct mei_nfc_connect_resp);

	cmd = kzalloc(connect_length, GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;
	connect = (struct mei_nfc_connect *)cmd->data;

	reply = kzalloc(connect_resp_length, GFP_KERNEL);
	if (!reply) {
		kfree(cmd);
		return -ENOMEM;
	}

	connect_resp = (struct mei_nfc_connect_resp *)reply->data;

	cmd->hdr.cmd = MEI_NFC_CMD_MAINTENANCE;
	cmd->hdr.data_size = 3;
	cmd->sub_command = MEI_NFC_SUBCMD_CONNECT;
	connect->fw_ivn = phy->fw_ivn;
	connect->vendor_id = phy->vendor_id;

	MEI_DUMP_NFC_HDR("connect request", &cmd->hdr);
	r = mei_cldev_send(phy->cldev, (u8 *)cmd, connect_length);
	if (r < 0) {
		pr_err("Could not send connect cmd %d\n", r);
		goto err;
	}

	bytes_recv = mei_cldev_recv(phy->cldev, (u8 *)reply,
				    connect_resp_length);
	if (bytes_recv < 0) {
		r = bytes_recv;
		pr_err("Could not read connect response %d\n", r);
		goto err;
	}

	MEI_DUMP_NFC_HDR("connect reply", &reply->hdr);

	pr_info("IVN 0x%x Vendor ID 0x%x\n",
		 connect_resp->fw_ivn, connect_resp->vendor_id);

	pr_info("ME FW %d.%d.%d.%d\n",
		connect_resp->me_major, connect_resp->me_minor,
		connect_resp->me_hotfix, connect_resp->me_build);

	r = 0;

err:
	kfree(reply);
	kfree(cmd);

	return r;
}