[PATCH 5.4 83/86] net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled

[Greg Kroah-Hartman]

From: Tariq Toukan <tariqt@xxxxxxxxxx>

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@xxxxxxxxxx>
Reviewed-by: Boris Pismenny <borisp@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210117151538.9411-1-tariqt@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 net/core/dev.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -8692,6 +8692,11 @@ static netdev_features_t netdev_fix_feat
 		}
 	}
 
+	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;
 }