From: Tariq Toukan <tariqt@nvidia.com>
Date: Sun, 17 Jan 2021 15:15:38 +0000 (+0200)
Subject: net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled
X-Git-Tag: v5.4.93~4
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ff64094dc71823938acb595cab27a4b07d6a6cd1;p=thirdparty%2Fkernel%2Fstable.git

net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled

commit a3eb4e9d4c9218476d05c52dfd2be3d6fdce6b91 upstream.

With NETIF_F_HW_TLS_RX packets are decrypted in HW. This cannot be
logically done when RXCSUM offload is off.

Fixes: 14136564c8ee ("net: Add TLS RX offload feature")
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Boris Pismenny <borisp@nvidia.com>
Link: https://lore.kernel.org/r/20210117151538.9411-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 20c7fd7b8b4bc..ec66d13d2bdad 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -8692,6 +8692,11 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
 		}
 	}
 
+	if ((features & NETIF_F_HW_TLS_RX) && !(features & NETIF_F_RXCSUM)) {
+		netdev_dbg(dev, "Dropping TLS RX HW offload feature since no RXCSUM feature.\n");
+		features &= ~NETIF_F_HW_TLS_RX;
+	}
+
 	return features;
 }