diff --git a/net/core/devlink.c b/net/core/devlink.c
index 6004bd0ccee4..d2df30829083 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -11925,8 +11925,10 @@ void devl_region_destroy(struct devlink_region *region)
 	devl_assert_locked(devlink);
 
 	/* Free all snapshots of region */
+	mutex_lock(&region->snapshot_lock);
 	list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
 		devlink_region_snapshot_del(region, snapshot);
+	mutex_unlock(&region->snapshot_lock);
 
 	list_del(&region->list);
 	mutex_destroy(&region->snapshot_lock);
diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
index 9de1d123f4f5..a08c02abde12 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
@@ -496,8 +496,8 @@ dummy_reporter_test()
 
 	check_reporter_info dummy healthy 3 3 10 true
 
-	echo 8192> $DEBUGFS_DIR/health/binary_len
-	check_fail $? "Failed set dummy reporter binary len to 8192"
+	echo 8192 > $DEBUGFS_DIR/health/binary_len
+	check_err $? "Failed set dummy reporter binary len to 8192"
 
 	local dump=$(devlink health dump show $DL_HANDLE reporter dummy -j)
 	check_err $? "Failed show dump of dummy reporter"
diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
index 109900c817be..b64d98ca0df7 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
@@ -47,6 +47,17 @@ if [ -d "${NETDEVSIM_PATH}/devices/netdevsim${DEV_ADDR}" ]; then
 	exit 1
 fi
 
+check_netdev_down()
+{
+	state=$(cat /sys/class/net/${NETDEV}/flags)
+
+	if [ $((state & 1)) -ne 0 ]; then
+		echo "WARNING: unexpected interface UP, disable NetworkManager?"
+
+		ip link set dev $NETDEV down
+	fi
+}
+
 init_test()
 {
 	RET=0
@@ -151,6 +162,7 @@ trap_stats_test()
 
 	RET=0
 
+	check_netdev_down
 	for trap_name in $(devlink_traps_get); do
 		devlink_trap_stats_idle_test $trap_name
 		check_err $? "Stats of trap $trap_name not idle when netdev down"
@@ -254,6 +266,7 @@ trap_group_stats_test()
 
 	RET=0
 
+	check_netdev_down
 	for group_name in $(devlink_trap_groups_get); do
 		devlink_trap_group_stats_idle_test $group_name
 		check_err $? "Stats of trap group $group_name not idle when netdev down"