net/sfc: fix adapter lock usage on rule creation

[ upstream commit 653b285 ]

The point is that adapter lock has to be held on
list accesses, as well as when talking to the HW.

Fixes: a9825cc ("net/sfc: support flow API filters")

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>

drivers/net/sfc/sfc_flow.c

@@ -2314,10 +2314,10 @@ sfc_flow_create(struct rte_eth_dev *dev,
 	if (rc != 0)
 		goto fail_bad_value;
 
-	TAILQ_INSERT_TAIL(&sa->filter.flow_list, flow, entries);
-
 	sfc_adapter_lock(sa);
 
+	TAILQ_INSERT_TAIL(&sa->filter.flow_list, flow, entries);
+
 	if (sa->state == SFC_ADAPTER_STARTED) {
 		rc = sfc_flow_filter_insert(sa, flow);
 		if (rc != 0) {