From 7402c798aa992f7d4f5acab574572bfe31512464 Mon Sep 17 00:00:00 2001
From: Ricardo Casallas <ricardo.casallas@silabs.com>
Date: Mon, 22 Aug 2022 14:29:01 -0400
Subject: [PATCH] [EFR32] Fix CSR length.

---
 src/platform/EFR32/Efr32PsaOpaqueKeypair.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/platform/EFR32/Efr32PsaOpaqueKeypair.cpp b/src/platform/EFR32/Efr32PsaOpaqueKeypair.cpp
index b1c32dc028471d..da72af848bab51 100644
--- a/src/platform/EFR32/Efr32PsaOpaqueKeypair.cpp
+++ b/src/platform/EFR32/Efr32PsaOpaqueKeypair.cpp
@@ -407,7 +407,9 @@ CHIP_ERROR EFR32OpaqueP256Keypair::Deserialize(P256SerializedKeypair & input)
 CHIP_ERROR EFR32OpaqueP256Keypair::NewCertificateSigningRequest(uint8_t * out_csr, size_t & csr_length) const
 {
     MutableByteSpan csr(out_csr, csr_length);
-    return GenerateCertificateSigningRequest(this, csr);
+    CHIP_ERROR err = GenerateCertificateSigningRequest(this, csr);
+    csr_length     = (CHIP_NO_ERROR == err) ? csr.size() : 0;
+    return err;
 }
 
 CHIP_ERROR EFR32OpaqueP256Keypair::ECDSA_sign_msg(const uint8_t * msg, size_t msg_length, P256ECDSASignature & out_signature) const