crypto: api - Change crypto_unregister_instance argument type

This patch makes crypto_unregister_instance take a crypto_instance
instead of a crypto_alg.  This allows us to remove a duplicate
CRYPTO_ALG_INSTANCE check in crypto_unregister_instance.

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

2 files changed, 3 insertions, 7 deletions

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 0f1976eceb27..f1d0307b1d08 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -551,17 +551,13 @@ err:
 }
 EXPORT_SYMBOL_GPL(crypto_register_instance);
 
-int crypto_unregister_instance(struct crypto_alg *alg)
+int crypto_unregister_instance(struct crypto_instance *inst)
 {
-        struct crypto_instance *inst = (void *)alg;
         LIST_HEAD(list);
 
-        if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE))
-                return -EINVAL;
-
         down_write(&crypto_alg_sem);
 
-        crypto_remove_spawns(alg, &list, NULL);
+        crypto_remove_spawns(&inst->alg, &list, NULL);
         crypto_remove_instance(inst, &list);
 
         up_write(&crypto_alg_sem);
diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
index c5148a35ae0a..eab249723830 100644
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -316,7 +316,7 @@ static int crypto_del_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
         if (atomic_read(&alg->cra_refcnt) != 1)
                 return -EBUSY;
 
-        return crypto_unregister_instance(alg);
+        return crypto_unregister_instance((struct crypto_instance *)alg);
 }
 
 static struct crypto_alg *crypto_user_skcipher_alg(const char *name, u32 type,