net/mlx5e: kTLS, Fix missing error unwind on unsupported cipher type

Do proper error unwinding when adding an unsupported TX/RX cipher type.
Move the switch case prior to key creation so there's less to unwind,
and change the goto label name to describe the action performed instead
of what failed.

Fixes: 4960c41 ("net/mlx5e: Support 256 bit keys with kTLS device offload")
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Author: gal-pressman

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_rx.c

@@ -621,15 +621,6 @@ int mlx5e_ktls_add_rx(struct net_device *netdev, struct sock *sk,
 	if (unlikely(!priv_rx))
 		return -ENOMEM;
 
-	dek = mlx5_ktls_create_key(priv->tls->dek_pool, crypto_info);
-	if (IS_ERR(dek)) {
-		err = PTR_ERR(dek);
-		goto err_create_key;
-	}
-	priv_rx->dek = dek;
-
-	INIT_LIST_HEAD(&priv_rx->list);
-	spin_lock_init(&priv_rx->lock);
 	switch (crypto_info->cipher_type) {
 	case TLS_CIPHER_AES_GCM_128:
 		priv_rx->crypto_info.crypto_info_128 =
@@ -642,9 +633,20 @@ int mlx5e_ktls_add_rx(struct net_device *netdev, struct sock *sk,
 	default:
 		WARN_ONCE(1, "Unsupported cipher type %u\n",
 			  crypto_info->cipher_type);
-		return -EOPNOTSUPP;
+		err = -EOPNOTSUPP;
+		goto err_cipher_type;
 	}
 
+	dek = mlx5_ktls_create_key(priv->tls->dek_pool, crypto_info);
+	if (IS_ERR(dek)) {
+		err = PTR_ERR(dek);
+		goto err_cipher_type;
+	}
+	priv_rx->dek = dek;
+
+	INIT_LIST_HEAD(&priv_rx->list);
+	spin_lock_init(&priv_rx->lock);
+
 	rxq = mlx5e_ktls_sk_get_rxq(sk);
 	priv_rx->rxq = rxq;
 	priv_rx->sk = sk;
@@ -677,7 +679,7 @@ int mlx5e_ktls_add_rx(struct net_device *netdev, struct sock *sk,
 	mlx5e_tir_destroy(&priv_rx->tir);
 err_create_tir:
 	mlx5_ktls_destroy_key(priv->tls->dek_pool, priv_rx->dek);
-err_create_key:
+err_cipher_type:
 	kfree(priv_rx);
 	return err;
 }

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c

@@ -469,14 +469,6 @@ int mlx5e_ktls_add_tx(struct net_device *netdev, struct sock *sk,
 	if (IS_ERR(priv_tx))
 		return PTR_ERR(priv_tx);
 
-	dek = mlx5_ktls_create_key(priv->tls->dek_pool, crypto_info);
-	if (IS_ERR(dek)) {
-		err = PTR_ERR(dek);
-		goto err_create_key;
-	}
-	priv_tx->dek = dek;
-
-	priv_tx->expected_seq = start_offload_tcp_sn;
 	switch (crypto_info->cipher_type) {
 	case TLS_CIPHER_AES_GCM_128:
 		priv_tx->crypto_info.crypto_info_128 =
@@ -489,8 +481,18 @@ int mlx5e_ktls_add_tx(struct net_device *netdev, struct sock *sk,
 	default:
 		WARN_ONCE(1, "Unsupported cipher type %u\n",
 			  crypto_info->cipher_type);
-		return -EOPNOTSUPP;
+		err = -EOPNOTSUPP;
+		goto err_pool_push;
 	}
+
+	dek = mlx5_ktls_create_key(priv->tls->dek_pool, crypto_info);
+	if (IS_ERR(dek)) {
+		err = PTR_ERR(dek);
+		goto err_pool_push;
+	}
+
+	priv_tx->dek = dek;
+	priv_tx->expected_seq = start_offload_tcp_sn;
 	priv_tx->tx_ctx = tls_offload_ctx_tx(tls_ctx);
 
 	mlx5e_set_ktls_tx_priv_ctx(tls_ctx, priv_tx);
@@ -500,7 +502,7 @@ int mlx5e_ktls_add_tx(struct net_device *netdev, struct sock *sk,
 
 	return 0;
 
-err_create_key:
+err_pool_push:
 	pool_push(pool, priv_tx);
 	return err;
 }