From: Mateusz Palczewski <mateusz.palczewski@intel.com>
Date: Mon, 28 Dec 2020 11:38:00 +0100
Subject: i40e: Fix add TC filter for IPv6
Patch-mainline: v5.12-rc1
Git-commit: 61c1e0eb8375def7c891bfe857bb795a57090526
References: bsc#1109837 bsc#1111981 FATE#326312

Fix insufficient distinction between IPv4 and IPv6 addresses
when creating a filter.
IPv4 and IPv6 are kept in the same memory area. If IPv6 is added,
then it's caught by IPv4 check, which leads to err -95.

Fixes: 2f4b411a3d67 ("i40e: Enable cloud filters via tc-flower")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Reviewed-by: Jaroslaw Gawin <jaroslawx.gawin@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7182,7 +7182,8 @@ int i40e_add_del_cloud_filter_big_buf(st
 		return -EOPNOTSUPP;
 
 	/* adding filter using src_port/src_ip is not supported at this stage */
-	if (filter->src_port || filter->src_ipv4 ||
+	if (filter->src_port ||
+	    (filter->src_ipv4 && filter->n_proto != ETH_P_IPV6) ||
 	    !ipv6_addr_any(&filter->ip.v6.src_ip6))
 		return -EOPNOTSUPP;
 
@@ -7211,7 +7212,7 @@ int i40e_add_del_cloud_filter_big_buf(st
 			cpu_to_le16(I40E_AQC_ADD_CLOUD_FILTER_MAC_VLAN_PORT);
 		}
 
-	} else if (filter->dst_ipv4 ||
+	} else if ((filter->dst_ipv4 && filter->n_proto != ETH_P_IPV6) ||
 		   !ipv6_addr_any(&filter->ip.v6.dst_ip6)) {
 		cld_filter.element.flags =
 				cpu_to_le16(I40E_AQC_ADD_CLOUD_FILTER_IP_PORT);