netdev - [patch net-next] net: sched: silence uninitialized parent variable warning in tc_dump

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Message-Id: <20180118080555.1627-1-jiri@resnulli.us>
Date:   Thu, 18 Jan 2018 09:05:55 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jhs@...atatu.com, xiyou.wangcong@...il.com,
        mlxsw@...lanox.com, sfr@...b.auug.org.au
Subject: [patch net-next] net: sched: silence uninitialized parent variable warning in tc_dump_tfilter

From: Jiri Pirko <jiri@...lanox.com>

When tcm->tcm_ifindex == TCM_IFINDEX_MAGIC_BLOCK, parent is still passed
down but the value is never used. Compiler does not recognize it and
issues a warning. Silence it down initializing parent to 0.

Reported-by: David Miller <davem@...emloft.net>
Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 net/sched/cls_api.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index e500d11da9cd..9683f8550f6f 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -1303,7 +1303,7 @@ static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb)
 	struct tcmsg *tcm = nlmsg_data(cb->nlh);
 	long index_start;
 	long index;
-	u32 parent;
+	u32 parent = 0;
 	int err;
 
 	if (nlmsg_len(cb->nlh) < sizeof(*tcm))
-- 
2.14.3