[PATCH 4.19 18/77] qede: fix offload for IPIP tunnel packets

[Greg Kroah-Hartman]

From: Manish Chopra <manishc@xxxxxxxxxxx>

[ Upstream commit 5d5647dad259bb416fd5d3d87012760386d97530 ]

IPIP tunnels packets are unknown to device,
hence these packets are incorrectly parsed and
caused the packet corruption, so disable offlods
for such packets at run time.

Signed-off-by: Manish Chopra <manishc@xxxxxxxxxxx>
Signed-off-by: Sudarsana Kalluru <skalluru@xxxxxxxxxxx>
Signed-off-by: Igor Russkikh <irusskikh@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201221145530.7771-1-manishc@xxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/qlogic/qede/qede_fp.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/net/ethernet/qlogic/qede/qede_fp.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c
@@ -1747,6 +1747,11 @@ netdev_features_t qede_features_check(st
 			      ntohs(udp_hdr(skb)->dest) != gnv_port))
 				return features & ~(NETIF_F_CSUM_MASK |
 						    NETIF_F_GSO_MASK);
+		} else if (l4_proto == IPPROTO_IPIP) {
+			/* IPIP tunnels are unknown to the device or at least unsupported natively,
+			 * offloads for them can't be done trivially, so disable them for such skb.
+			 */
+			return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
 		}
 	}