tls: Pass rec instead of aead_req into tls_encrypt_done

The function tls_encrypt_done only uses aead_req to get ahold of
the tls_rec object.  So we could pass that in instead of aead_req
to simplify the code.
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

net/tls/tls_sw.c

@@ -430,18 +430,16 @@ int tls_tx_records(struct sock *sk, int flags)
 
 static void tls_encrypt_done(void *data, int err)
 {
-	struct aead_request *aead_req = data;
 	struct tls_sw_context_tx *ctx;
 	struct tls_context *tls_ctx;
 	struct tls_prot_info *prot;
+	struct tls_rec *rec = data;
 	struct scatterlist *sge;
 	struct sk_msg *msg_en;
-	struct tls_rec *rec;
 	bool ready = false;
 	struct sock *sk;
 	int pending;
 
-	rec = container_of(aead_req, struct tls_rec, aead_req);
 	msg_en = &rec->msg_encrypted;
 
 	sk = rec->sk;
@@ -536,7 +534,7 @@ static int tls_do_encryption(struct sock *sk,
 			       data_len, rec->iv_data);
 
 	aead_request_set_callback(aead_req, CRYPTO_TFM_REQ_MAY_BACKLOG,
-				  tls_encrypt_done, aead_req);
+				  tls_encrypt_done, rec);
 
 	/* Add the record in tx_list */
 	list_add_tail((struct list_head *)&rec->list, &ctx->tx_list);