linux-kernel - [PATCH] net: Remove redundant assignment to err

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Date:   Thu, 29 Apr 2021 09:32:36 +0800
From:   Yang Li <yang.lee@...ux.alibaba.com>
To:     davem@...emloft.net
Cc:     yoshfuji@...ux-ipv6.org, dsahern@...nel.org, kuba@...nel.org,
        nathan@...nel.org, ndesaulniers@...gle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        Yang Li <yang.lee@...ux.alibaba.com>
Subject: [PATCH] net: Remove redundant assignment to err

Variable 'err' is set to -ENOMEM but this value is never read as it is
overwritten with a new value later on, hence the 'If statements' and 
assignments are redundantand and can be removed.

Cleans up the following clang-analyzer warning:

net/ipv6/seg6.c:126:4: warning: Value stored to 'err' is never read
[clang-analyzer-deadcode.DeadStores]

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
---
 net/ipv6/seg6.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/net/ipv6/seg6.c b/net/ipv6/seg6.c
index d2f8138..e412817 100644
--- a/net/ipv6/seg6.c
+++ b/net/ipv6/seg6.c
@@ -122,9 +122,6 @@ static int seg6_genl_sethmac(struct sk_buff *skb, struct genl_info *info)
 	hinfo = seg6_hmac_info_lookup(net, hmackeyid);
 
 	if (!slen) {
-		if (!hinfo)
-			err = -ENOENT;
-
 		err = seg6_hmac_info_del(net, hmackeyid);
 
 		goto out_unlock;
-- 
1.8.3.1