From 36fe8b9f4b4b65432d84bbd26ebcad97e6d6e593 Mon Sep 17 00:00:00 2001
From: Valerio Setti <valerio.setti@nordicsemi.no>
Date: Mon, 23 Oct 2023 14:12:23 +0200
Subject: [PATCH] psa_crypto_cipher: add guard for unused variable

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
---
 library/psa_crypto_cipher.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/psa_crypto_cipher.c b/library/psa_crypto_cipher.c
index b195bb9fd5..38be84b0b7 100644
--- a/library/psa_crypto_cipher.c
+++ b/library/psa_crypto_cipher.c
@@ -91,7 +91,10 @@ psa_status_t mbedtls_cipher_values_from_psa(
     mbedtls_cipher_id_t *cipher_id)
 {
     mbedtls_cipher_id_t cipher_id_tmp;
+    /* Only DES modifies key_bits */
+#if !defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DES)
     (void) key_bits;
+#endif
 
     if (PSA_ALG_IS_AEAD(alg)) {
         alg = PSA_ALG_AEAD_WITH_SHORTENED_TAG(alg, 0);