int optee_supp_send()

in optee/supp.c [338:382]

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

int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params,
		    struct tee_param *param)
{
	struct tee_device *teedev = ctx->teedev;
	struct optee *optee = tee_get_drvdata(teedev);
	struct optee_supp *supp = &optee->supp;
	struct optee_supp_req *req;
	size_t n;
	size_t num_meta;

	mutex_lock(&supp->mutex);
	req = supp_pop_req(supp, num_params, param, &num_meta);
	mutex_unlock(&supp->mutex);

	if (IS_ERR(req)) {
		/* Something is wrong, let supplicant restart. */
		return PTR_ERR(req);
	}

	/* Update out and in/out parameters */
	for (n = 0; n < req->num_params; n++) {
		struct tee_param *p = req->param + n;

		switch (p->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) {
		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
		case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
			p->u.value.a = param[n + num_meta].u.value.a;
			p->u.value.b = param[n + num_meta].u.value.b;
			p->u.value.c = param[n + num_meta].u.value.c;
			break;
		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
		case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
			p->u.memref.size = param[n + num_meta].u.memref.size;
			break;
		default:
			break;
		}
	}
	req->ret = ret;

	/* Let the requesting thread continue */
	complete(&req->c);

	return 0;
}