From 041087bfe8389ba69eab62c4c4955ac402b2ec1f Mon Sep 17 00:00:00 2001
From: Kapil Gupta <kapgupta@codeaurora.org>
Date: Mon, 17 Apr 2017 17:25:52 +0530
Subject: [PATCH] qcacmn: Resolve compilation errors in lower version kernels

symmetric key cipher APIs are present in linux kernel version 4.3
and above only.

Add changes to protect symmetric key cipher APIs invoke in lower
version kernels.

Change-Id: I512d0d98886c887a242a834763b46b2ec0cd4751
CRs-Fixed: 2034502
---
 qdf/linux/src/qdf_crypto.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/qdf/linux/src/qdf_crypto.c b/qdf/linux/src/qdf_crypto.c
index c79bd201db..98f2c25ca1 100644
--- a/qdf/linux/src/qdf_crypto.c
+++ b/qdf/linux/src/qdf_crypto.c
@@ -261,6 +261,7 @@ error:
 	return ret;
 }
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0))
 int qdf_aes_ctr(const uint8_t *key, unsigned int key_len, uint8_t *siv,
 		const uint8_t *src, size_t src_len, uint8_t *dest, bool enc)
 {
@@ -319,3 +320,10 @@ int qdf_aes_ctr(const uint8_t *key, unsigned int key_len, uint8_t *siv,
 	crypto_free_skcipher(tfm);
 	return ret;
 }
+#else
+int qdf_aes_ctr(const uint8_t *key, unsigned int key_len, uint8_t *siv,
+		const uint8_t *src, size_t src_len, uint8_t *dest, bool enc)
+{
+	return -EINVAL;
+}
+#endif