netdev - [PATCH net-next] net: remove redundant NULL check in remove_xps

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date: Mon, 24 Jul 2023 10:37:35 +0800
From: Zhengchao Shao <shaozhengchao@...wei.com>
To: <netdev@...r.kernel.org>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>
CC: <simon.horman@...igine.com>, <kuniyu@...zon.com>, <liuhangbin@...il.com>,
	<jiri@...nulli.us>, <hkallweit1@...il.com>, <andy.ren@...cruise.com>,
	<weiyongjun1@...wei.com>, <yuehaibing@...wei.com>, <shaozhengchao@...wei.com>
Subject: [PATCH net-next] net: remove redundant NULL check in remove_xps_queue()

There are currently two paths that call remove_xps_queue():
1. __netif_set_xps_queue -> remove_xps_queue
2. clean_xps_maps -> remove_xps_queue_cpu -> remove_xps_queue
There is no need to check dev_maps in remove_xps_queue() because
dev_maps has been checked on these two paths.

Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
 net/core/dev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index f95e0674570f..76a91b849829 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2384,8 +2384,7 @@ static bool remove_xps_queue(struct xps_dev_maps *dev_maps,
 	struct xps_map *map = NULL;
 	int pos;
 
-	if (dev_maps)
-		map = xmap_dereference(dev_maps->attr_map[tci]);
+	map = xmap_dereference(dev_maps->attr_map[tci]);
 	if (!map)
 		return false;
 
-- 
2.34.1