From: Taehee Yoo <ap420073@gmail.com>
Date: Fri, 22 Nov 2019 08:15:19 +0000
Subject: net: use rhashtable_lookup() instead of rhashtable_lookup_fast()
Patch-mainline: v5.5-rc1
Git-commit: ab818362c9054beb950b97a09ce7b0d56f5a32a1
References: bsc#1154353

rhashtable_lookup_fast() internally calls rcu_read_lock() then,
calls rhashtable_lookup(). So if rcu_read_lock() is already held,
rhashtable_lookup() is enough.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hfi1/sdma.c                |    4 ++--
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c  |    2 +-
 drivers/net/ethernet/netronome/nfp/bpf/offload.c |    4 ++--
 net/tipc/socket.c                                |    2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/infiniband/hw/hfi1/sdma.c
+++ b/drivers/infiniband/hw/hfi1/sdma.c
@@ -881,8 +881,8 @@ struct sdma_engine *sdma_select_user_eng
 
 	cpu_id = smp_processor_id();
 	rcu_read_lock();
-	rht_node = rhashtable_lookup_fast(dd->sdma_rht, &cpu_id,
-					  sdma_rht_params);
+	rht_node = rhashtable_lookup(dd->sdma_rht, &cpu_id,
+				     sdma_rht_params);
 
 	if (rht_node && rht_node->map[vl]) {
 		struct sdma_rht_map_elem *map = rht_node->map[vl];
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -3850,7 +3850,7 @@ int mlx5e_delete_flower(struct net_devic
 	int err;
 
 	rcu_read_lock();
-	flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params);
+	flow = rhashtable_lookup(tc_ht, &f->cookie, tc_ht_params);
 	if (!flow || !same_flow_direction(flow, flags)) {
 		err = -EINVAL;
 		goto errout;
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -458,8 +458,8 @@ int nfp_bpf_event_output(struct nfp_app_
 		return -EINVAL;
 
 	rcu_read_lock();
-	record = rhashtable_lookup_fast(&bpf->maps_neutral, &map_id,
-					nfp_bpf_maps_neutral_params);
+	record = rhashtable_lookup(&bpf->maps_neutral, &map_id,
+				   nfp_bpf_maps_neutral_params);
 	if (!record || map_id_full > U32_MAX) {
 		rcu_read_unlock();
 		cmsg_warn(bpf, "perf event: map id %lld (0x%llx) not recognized, dropping event\n",
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2804,7 +2804,7 @@ static struct tipc_sock *tipc_sk_lookup(
 	struct tipc_sock *tsk;
 
 	rcu_read_lock();
-	tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params);
+	tsk = rhashtable_lookup(&tn->sk_rht, &portid, tsk_rht_params);
 	if (tsk)
 		sock_hold(&tsk->sk);
 	rcu_read_unlock();