Prevent to initialise backends twice.

[platform/upstream/cryptsetup.git] / lib / crypto_backend / crypto_kernel.c

diff --git a/lib/crypto_backend/crypto_kernel.c b/lib/crypto_backend/crypto_kernel.c
index e360140..6005b8e 100644 (file)
--- a/lib/crypto_backend/crypto_kernel.c
+++ b/lib/crypto_backend/crypto_kernel.c
@@ -33,6 +33,8 @@
 #define SOL_ALG 279
 #endif
 
+static int crypto_backend_initialised = 0;
+
 struct hash_alg {
        const char *name;
        const char *kernel_name;
@@ -97,6 +99,9 @@ int crypt_backend_init(void)
        };
        int tfmfd = -1, opfd = -1;
 
+       if (crypto_backend_initialised)
+               return 0;
+
        log_dbg("Initialising kernel crypto API backend.");
 
        if (uname(&uts) == -1 || strcmp(uts.sysname, "Linux"))
@@ -108,6 +113,8 @@ int crypt_backend_init(void)
 
        close(tfmfd);
        close(opfd);
+
+       crypto_backend_initialised = 1;
        return 0;
 }