[CRYPTO] api: Add type-safe spawns

This patch allows spawns of specific types (e.g., cipher) to be allocated.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 5 insertions, 4 deletions

diff --git a/crypto/xcbc.c b/crypto/xcbc.c
index 317e9f08fc04..d7b4be0a057d 100644
--- a/crypto/xcbc.c
+++ b/crypto/xcbc.c
@@ -254,14 +254,15 @@ static int crypto_xcbc_digest(struct hash_desc *pdesc,
 
 static int xcbc_init_tfm(struct crypto_tfm *tfm)
 {
+        struct crypto_cipher *cipher;
         struct crypto_instance *inst = (void *)tfm->__crt_alg;
         struct crypto_spawn *spawn = crypto_instance_ctx(inst);
         struct crypto_xcbc_ctx *ctx = crypto_hash_ctx_aligned(__crypto_hash_cast(tfm));
         int bs = crypto_hash_blocksize(__crypto_hash_cast(tfm));
 
-        tfm = crypto_spawn_tfm(spawn);
-        if (IS_ERR(tfm))
-                return PTR_ERR(tfm);
+        cipher = crypto_spawn_cipher(spawn);
+        if (IS_ERR(cipher))
+                return PTR_ERR(cipher);
 
         switch(bs) {
         case 16:
@@ -271,7 +272,7 @@ static int xcbc_init_tfm(struct crypto_tfm *tfm)
                 return -EINVAL;
         }
 
-        ctx->child = crypto_cipher_cast(tfm);
+        ctx->child = cipher;
         ctx->odds = (u8*)(ctx+1);
         ctx->prev = ctx->odds + bs;
         ctx->key = ctx->prev + bs;