Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

David writes:
  "Networking

   1) RXRPC receive path fixes from David Howells.

   2) Re-export __skb_recv_udp(), from Jiri Kosina.

   3) Fix refcounting in u32 classificer, from Al Viro.

   4) Userspace netlink ABI fixes from Eugene Syromiatnikov.

   5) Don't double iounmap on rmmod in ena driver, from Arthur
      Kiyanovski.

   6) Fix devlink string attribute handling, we must pull a copy into a
      kernel buffer if the lifetime extends past the netlink request.
      From Moshe Shemesh.

   7) Fix hangs in RDS, from Ka-Cheong Poon.

   8) Fix recursive locking lockdep warnings in tipc, from Ying Xue.

   9) Clear RX irq correctly in socionext, from Ilias Apalodimas.

   10) bcm_sf2 fixes from Florian Fainelli."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (38 commits)
  net: dsa: bcm_sf2: Call setup during switch resume
  net: dsa: bcm_sf2: Fix unbind ordering
  net: phy: sfp: remove sfp_mutex's definition
  r8169: set RX_MULTI_EN bit in RxConfig for 8168F-family chips
  net: socionext: clear rx irq correctly
  net/mlx4_core: Fix warnings during boot on driverinit param set failures
  tipc: eliminate possible recursive locking detected by LOCKDEP
  selftests: udpgso_bench.sh explicitly requires bash
  selftests: rtnetlink.sh explicitly requires bash.
  qmi_wwan: Added support for Gemalto's Cinterion ALASxx WWAN interface
  tipc: queue socket protocol error messages into socket receive buffer
  tipc: set link tolerance correctly in broadcast link
  net: ipv4: don't let PMTU updates increase route MTU
  net: ipv4: update fnhe_pmtu when first hop's MTU changes
  net/ipv6: stop leaking percpu memory in fib6 info
  rds: RDS (tcp) hangs on sendto() to unresponding address
  net: make skb_partial_csum_set() more robust against overflows
  devlink: Add helper function for safely copy string param
  devlink: Fix param cmode driverinit for string type
  devlink: Fix param set handling for string type
  ...

1 files changed, 5 insertions, 5 deletions

diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index f218ccf1e2d9..b2c3406a2cf2 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -398,6 +398,7 @@ static int u32_init(struct tcf_proto *tp)
 	rcu_assign_pointer(tp_c->hlist, root_ht);
 	root_ht->tp_c = tp_c;
 
+	root_ht->refcnt++;
 	rcu_assign_pointer(tp->root, root_ht);
 	tp->data = tp_c;
 	return 0;
@@ -610,7 +611,7 @@ static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht,
 	struct tc_u_hnode __rcu **hn;
 	struct tc_u_hnode *phn;
 
-	WARN_ON(ht->refcnt);
+	WARN_ON(--ht->refcnt);
 
 	u32_clear_hnode(tp, ht, extack);
 
@@ -649,7 +650,7 @@ static void u32_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
 
 	WARN_ON(root_ht == NULL);
 
-	if (root_ht && --root_ht->refcnt == 0)
+	if (root_ht && --root_ht->refcnt == 1)
 		u32_destroy_hnode(tp, root_ht, extack);
 
 	if (--tp_c->refcnt == 0) {
@@ -698,7 +699,6 @@ static int u32_delete(struct tcf_proto *tp, void *arg, bool *last,
 	}
 
 	if (ht->refcnt == 1) {
-		ht->refcnt--;
 		u32_destroy_hnode(tp, ht, extack);
 	} else {
 		NL_SET_ERR_MSG_MOD(extack, "Can not delete in-use filter");
@@ -708,11 +708,11 @@ static int u32_delete(struct tcf_proto *tp, void *arg, bool *last,
 out:
 	*last = true;
 	if (root_ht) {
-		if (root_ht->refcnt > 1) {
+		if (root_ht->refcnt > 2) {
 			*last = false;
 			goto ret;
 		}
-		if (root_ht->refcnt == 1) {
+		if (root_ht->refcnt == 2) {
 			if (!ht_empty(root_ht)) {
 				*last = false;
 				goto ret;