net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled

stable inclusion
from stable-5.10.11
commit f0f3d3e6e938d72c371e9838dad0014b1a788dbd
bugzilla: 47621

--------------------------------

commit a3eb4e9d upstream.

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

Fixes: 14136564 ("net: Add TLS RX offload feature")
Signed-off-by: NTariq Toukan <tariqt@nvidia.com>
Reviewed-by: NBoris Pismenny <borisp@nvidia.com>
Link: https://lore.kernel.org/r/20210117151538.9411-1-tariqt@nvidia.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

net/core/dev.c

@@ -9602,6 +9602,11 @@ 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;
 }