int handle_open_session()

in amdtee/call.c [351:397]

• 39 lines of code
• 9 McCabe index (conditional complexity)

int handle_open_session(struct tee_ioctl_open_session_arg *arg, u32 *info,
			struct tee_param *p)
{
	struct tee_cmd_open_session cmd = {0};
	int ret;

	if (!arg || !info || (!p && arg->num_params))
		return -EINVAL;

	arg->ret_origin = TEEC_ORIGIN_COMMS;

	if (arg->session == 0) {
		arg->ret = TEEC_ERROR_GENERIC;
		return -EINVAL;
	}

	ret = tee_params_to_amd_params(p, arg->num_params, &cmd.op);
	if (ret) {
		pr_err("invalid Params. Abort open session\n");
		arg->ret = TEEC_ERROR_BAD_PARAMETERS;
		return ret;
	}

	cmd.ta_handle = get_ta_handle(arg->session);
	*info = 0;

	ret = psp_tee_process_cmd(TEE_CMD_ID_OPEN_SESSION, (void *)&cmd,
				  sizeof(cmd), &arg->ret);
	if (ret) {
		arg->ret = TEEC_ERROR_COMMUNICATION;
	} else {
		ret = amd_params_to_tee_params(p, arg->num_params, &cmd.op);
		if (unlikely(ret)) {
			pr_err("open session: failed to copy output\n");
			arg->ret = TEEC_ERROR_GENERIC;
			return ret;
		}
		arg->ret_origin = cmd.return_origin;
		*info = cmd.session_info;
		pr_debug("open session: session info = 0x%x\n", *info);
	}

	pr_debug("open session: ret = 0x%x RO = 0x%x\n", arg->ret,
		 arg->ret_origin);

	return ret;
}