[PATCH v8 1/6] net: tls: reject TLS 1.3 offload in chcr_ktls and nfp drivers

[Rishikesh Jethwani <rjethwani@purestorage.com>]

These drivers only support TLS 1.2. Return early when TLS 1.3
is requested to prevent unsupported hardware offload attempts.

Signed-off-by: Rishikesh Jethwani <rjethwani@purestorage.com>
---
 drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c | 3 +++
 drivers/net/ethernet/netronome/nfp/crypto/tls.c                | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c b/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
index f5acd4be1e69..29e108ce6764 100644
--- a/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
+++ b/drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
@@ -431,6 +431,9 @@ static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
 	atomic64_inc(&port_stats->ktls_tx_connection_open);
 	u_ctx = adap->uld[CXGB4_ULD_KTLS].handle;
 
+	if (crypto_info->version != TLS_1_2_VERSION)
+		goto out;
+
 	if (direction == TLS_OFFLOAD_CTX_DIR_RX) {
 		pr_err("not expecting for RX direction\n");
 		goto out;
diff --git a/drivers/net/ethernet/netronome/nfp/crypto/tls.c b/drivers/net/ethernet/netronome/nfp/crypto/tls.c
index 9983d7aa2b9c..13864c6a55dc 100644
--- a/drivers/net/ethernet/netronome/nfp/crypto/tls.c
+++ b/drivers/net/ethernet/netronome/nfp/crypto/tls.c
@@ -287,6 +287,9 @@ nfp_net_tls_add(struct net_device *netdev, struct sock *sk,
 	BUILD_BUG_ON(offsetof(struct nfp_net_tls_offload_ctx, rx_end) >
 		     TLS_DRIVER_STATE_SIZE_RX);
 
+	if (crypto_info->version != TLS_1_2_VERSION)
+		return -EOPNOTSUPP;
+
 	if (!nfp_net_cipher_supported(nn, crypto_info->cipher_type, direction))
 		return -EOPNOTSUPP;
 
-- 
2.25.1