int handle_unload_ta()

in amdtee/call.c [167:201]

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

int handle_unload_ta(u32 ta_handle)
{
	struct tee_cmd_unload_ta cmd = {0};
	u32 status, count;
	int ret;

	if (!ta_handle)
		return -EINVAL;

	mutex_lock(&ta_refcount_mutex);

	count = put_ta_refcount(ta_handle);

	if (count) {
		pr_debug("unload ta: not unloading %u count %u\n",
			 ta_handle, count);
		ret = -EBUSY;
		goto unlock;
	}

	cmd.ta_handle = ta_handle;

	ret = psp_tee_process_cmd(TEE_CMD_ID_UNLOAD_TA, (void *)&cmd,
				  sizeof(cmd), &status);
	if (!ret && status != 0) {
		pr_err("unload ta: status = 0x%x\n", status);
		ret = -EBUSY;
	} else {
		pr_debug("unloaded ta handle %u\n", ta_handle);
	}

unlock:
	mutex_unlock(&ta_refcount_mutex);
	return ret;
}