[dpdk-stable] [PATCH v3] net/i40e: fix set rss hash function invalid

[Steve Yang <stevex.yang@intel.com>]

i40e can support following rss hash function types: default/toeplitz,
symmetric toeplitz, and simple_xor. However, when filter engine parses
pattern action, it only supports symmetric toeplitz & default.

Add simple_xor and toeplitz hash functions support when parsing pattern
action.

Fixes: ef4c16fd9148 ("net/i40e: refactor RSS flow")
Cc: stable@dpdk.org

Signed-off-by: Steve Yang <stevex.yang@intel.com>
---
v3:
 - add Cc stable line.
v2:
 - add the fix line.
 - support simple_xor and toeplitz hash functions explicitly.

 drivers/net/i40e/i40e_hash.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/net/i40e/i40e_hash.c b/drivers/net/i40e/i40e_hash.c
index b1cb24f437..0cef21c88f 100644
--- a/drivers/net/i40e/i40e_hash.c
+++ b/drivers/net/i40e/i40e_hash.c
@@ -1105,13 +1105,21 @@ i40e_hash_parse_pattern_act(const struct rte_eth_dev *dev,
 					  NULL,
 					  "RSS Queues not supported when pattern specified");
 
-	if (rss_act->func == RTE_ETH_HASH_FUNCTION_SYMMETRIC_TOEPLITZ)
+	switch (rss_act->func) {
+	case RTE_ETH_HASH_FUNCTION_SYMMETRIC_TOEPLITZ:
 		rss_conf->symmetric_enable = true;
-	else if (rss_act->func != RTE_ETH_HASH_FUNCTION_DEFAULT)
-		return rte_flow_error_set(error, -EINVAL,
-					  RTE_FLOW_ERROR_TYPE_ACTION_CONF,
-					  NULL,
-					  "Only symmetric TOEPLITZ supported when pattern specified");
+		break;
+	case RTE_ETH_HASH_FUNCTION_DEFAULT:
+	case RTE_ETH_HASH_FUNCTION_TOEPLITZ:
+	case RTE_ETH_HASH_FUNCTION_SIMPLE_XOR:
+		break;
+	default:
+		return rte_flow_error_set(error, EINVAL,
+				RTE_FLOW_ERROR_TYPE_ACTION_CONF,
+				NULL,
+				"RSS hash function not supported "
+				"when pattern specified");
+	}
 
 	if (!i40e_hash_validate_rss_types(rss_act->types))
 		return rte_flow_error_set(error, EINVAL,
-- 
2.27.0