netdev - [PATCH] net: marvell: prestera: Fix a NULL vs IS

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Date:   Fri, 25 Nov 2022 09:27:51 +0800
From:   Shang XiaoJing <shangxiaojing@...wei.com>
To:     <tchornyi@...vell.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <yevhen.orlov@...ision.eu>, <oleksandr.mazur@...ision.eu>,
        <netdev@...r.kernel.org>
CC:     <shangxiaojing@...wei.com>
Subject: [PATCH] net: marvell: prestera: Fix a NULL vs IS_ERR() check in some functions

rhashtable_lookup_fast() returns NULL when failed instead of error
pointer.

Fixes: 396b80cb5cc8 ("net: marvell: prestera: Add neighbour cache accounting")
Fixes: 0a23ae237171 ("net: marvell: prestera: Add router nexthops ABI")
Signed-off-by: Shang XiaoJing <shangxiaojing@...wei.com>
---
 drivers/net/ethernet/marvell/prestera/prestera_router.c    | 2 +-
 drivers/net/ethernet/marvell/prestera/prestera_router_hw.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router.c b/drivers/net/ethernet/marvell/prestera/prestera_router.c
index 4046be0e86ff..a9a1028cb17b 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router.c
@@ -457,7 +457,7 @@ prestera_kern_neigh_cache_find(struct prestera_switch *sw,
 	n_cache =
 	 rhashtable_lookup_fast(&sw->router->kern_neigh_cache_ht, key,
 				__prestera_kern_neigh_cache_ht_params);
-	return IS_ERR(n_cache) ? NULL : n_cache;
+	return n_cache;
 }
 
 static void
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
index aa080dc57ff0..02faaea2aefa 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router_hw.c
@@ -330,7 +330,7 @@ prestera_nh_neigh_find(struct prestera_switch *sw,
 
 	nh_neigh = rhashtable_lookup_fast(&sw->router->nh_neigh_ht,
 					  key, __prestera_nh_neigh_ht_params);
-	return IS_ERR(nh_neigh) ? NULL : nh_neigh;
+	return nh_neigh;
 }
 
 struct prestera_nh_neigh *
@@ -484,7 +484,7 @@ __prestera_nexthop_group_find(struct prestera_switch *sw,
 
 	nh_grp = rhashtable_lookup_fast(&sw->router->nexthop_group_ht,
 					key, __prestera_nexthop_group_ht_params);
-	return IS_ERR(nh_grp) ? NULL : nh_grp;
+	return nh_grp;
 }
 
 static struct prestera_nexthop_group *
-- 
2.17.1