crypto: cryptd - Only access common skcipher fields on spawn

As skcipher spawns may be of the type lskcipher, only the common
fields may be accessed.  This was already the case but use the
correct helpers to make this more obvious.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/cryptd.c

@@ -377,7 +377,7 @@ static int cryptd_create_skcipher(struct crypto_template *tmpl,
 {
 	struct skcipherd_instance_ctx *ctx;
 	struct skcipher_instance *inst;
-	struct skcipher_alg *alg;
+	struct skcipher_alg_common *alg;
 	u32 type;
 	u32 mask;
 	int err;
@@ -396,17 +396,17 @@ static int cryptd_create_skcipher(struct crypto_template *tmpl,
 	if (err)
 		goto err_free_inst;
 
-	alg = crypto_spawn_skcipher_alg(&ctx->spawn);
+	alg = crypto_spawn_skcipher_alg_common(&ctx->spawn);
 	err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
 	if (err)
 		goto err_free_inst;
 
 	inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
 		(alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
-	inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
-	inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
-	inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
-	inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
+	inst->alg.ivsize = alg->ivsize;
+	inst->alg.chunksize = alg->chunksize;
+	inst->alg.min_keysize = alg->min_keysize;
+	inst->alg.max_keysize = alg->max_keysize;
 
 	inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);