From 25aa2167f692210f2f47dede5c9bc5d79e42ecf9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mikolai=20G=C3=BCtschow?= <mikolai.guetschow@tu-dresden.de>
Date: Tue, 17 Oct 2023 17:40:19 +0200
Subject: [PATCH] sys/psa_crypto: allow repeated calls to psa_crypto_init()

as defined per https://armmbed.github.io/mbed-crypto/html/api/library/library.html?highlight=psa_crypto_init#c.psa_crypto_init
---
 sys/psa_crypto/psa_crypto.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/psa_crypto/psa_crypto.c b/sys/psa_crypto/psa_crypto.c
index af0a9dab4c..a780593f33 100644
--- a/sys/psa_crypto/psa_crypto.c
+++ b/sys/psa_crypto/psa_crypto.c
@@ -113,6 +113,10 @@ const char *psa_status_to_humanly_readable(psa_status_t status)
 
 psa_status_t psa_crypto_init(void)
 {
+    if (lib_initialized) {
+        return PSA_SUCCESS;
+    }
+
     lib_initialized = 1;
 
 #if (IS_USED(MODULE_PSA_KEY_SLOT_MGMT))