netdev - [PATCH net-next 6/6] sfc: fix flow type handling for RSS filters

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Date:   Tue, 27 Mar 2018 17:44:51 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     <linux-net-drivers@...arflare.com>,
        David Miller <davem@...emloft.net>
CC:     netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next 6/6] sfc: fix flow type handling for RSS filters

The FLOW_RSS flag was causing us to insert UDP filters when TCP was wanted.

Fixes: 42356d9a137b ("sfc: support RSS spreading of ethtool ntuple filters")
Signed-off-by: Edward Cree <ecree@...arflare.com>
---
 drivers/net/ethernet/sfc/ethtool.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index de1fac6cd34f..d3ee9df6f4f0 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -1088,6 +1088,7 @@ static int efx_ethtool_set_class_rule(struct efx_nic *efx,
 	struct ethtool_tcpip6_spec *ip6_mask = &rule->m_u.tcp_ip6_spec;
 	struct ethtool_usrip6_spec *uip6_entry = &rule->h_u.usr_ip6_spec;
 	struct ethtool_usrip6_spec *uip6_mask = &rule->m_u.usr_ip6_spec;
+	u32 flow_type = rule->flow_type & ~(FLOW_EXT | FLOW_RSS);
 	struct ethhdr *mac_entry = &rule->h_u.ether_spec;
 	struct ethhdr *mac_mask = &rule->m_u.ether_spec;
 	enum efx_filter_flags flags = 0;
@@ -1121,14 +1122,14 @@ static int efx_ethtool_set_class_rule(struct efx_nic *efx,
 	if (rule->flow_type & FLOW_RSS)
 		spec.rss_context = rss_context;
 
-	switch (rule->flow_type & ~(FLOW_EXT | FLOW_RSS)) {
+	switch (flow_type) {
 	case TCP_V4_FLOW:
 	case UDP_V4_FLOW:
 		spec.match_flags = (EFX_FILTER_MATCH_ETHER_TYPE |
 				    EFX_FILTER_MATCH_IP_PROTO);
 		spec.ether_type = htons(ETH_P_IP);
-		spec.ip_proto = ((rule->flow_type & ~FLOW_EXT) == TCP_V4_FLOW ?
-				 IPPROTO_TCP : IPPROTO_UDP);
+		spec.ip_proto = flow_type == TCP_V4_FLOW ? IPPROTO_TCP
+							 : IPPROTO_UDP;
 		if (ip_mask->ip4dst) {
 			if (ip_mask->ip4dst != IP4_ADDR_FULL_MASK)
 				return -EINVAL;
@@ -1162,8 +1163,8 @@ static int efx_ethtool_set_class_rule(struct efx_nic *efx,
 		spec.match_flags = (EFX_FILTER_MATCH_ETHER_TYPE |
 				    EFX_FILTER_MATCH_IP_PROTO);
 		spec.ether_type = htons(ETH_P_IPV6);
-		spec.ip_proto = ((rule->flow_type & ~FLOW_EXT) == TCP_V6_FLOW ?
-				 IPPROTO_TCP : IPPROTO_UDP);
+		spec.ip_proto = flow_type == TCP_V6_FLOW ? IPPROTO_TCP
+							 : IPPROTO_UDP;
 		if (!ip6_mask_is_empty(ip6_mask->ip6dst)) {
 			if (!ip6_mask_is_full(ip6_mask->ip6dst))
 				return -EINVAL;