net/ice: fix VLAN mode parser

[ upstream commit ac1926f641812d4033e320157d0c458f8fbee372 ]

Parser will not be created if raw packet filter is not support.
This patch add NULL pointer check for parser structure when VLAN
mode configure.

Fixes: 6e753d777ffc ("net/ice: initialize parser for double VLAN")

Signed-off-by: Qiming Yang <qiming.yang@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/ice/ice_generic_flow.c

@@ -1829,10 +1829,12 @@ ice_flow_init(struct ice_adapter *ad)
 	if (ice_parser_create(&ad->hw, &ad->psr) != ICE_SUCCESS)
 		PMD_INIT_LOG(WARNING, "Failed to initialize DDP parser, raw packet filter will not be supported");
 
-	if (ice_is_dvm_ena(&ad->hw))
-		ice_parser_dvm_set(ad->psr, true);
-	else
-		ice_parser_dvm_set(ad->psr, false);
+	if (ad->psr) {
+		if (ice_is_dvm_ena(&ad->hw))
+			ice_parser_dvm_set(ad->psr, true);
+		else
+			ice_parser_dvm_set(ad->psr, false);
+	}
 
 	RTE_TAILQ_FOREACH_SAFE(engine, &engine_list, node, temp) {
 		if (engine->init == NULL) {