netdev - [PATCH][net-next] tun: remove unnecessary check in tun_flow

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Message-Id: <1544084891-3015-1-git-send-email-lirongqing@baidu.com>
Date:   Thu,  6 Dec 2018 16:28:11 +0800
From:   Li RongQing <lirongqing@...du.com>
To:     netdev@...r.kernel.org
Subject: [PATCH][net-next] tun: remove unnecessary check in tun_flow_update

caller has guaranted that rxhash is not zero

Signed-off-by: Li RongQing <lirongqing@...du.com>
---
 drivers/net/tun.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index d0745dc81976..6760b86547df 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -529,10 +529,7 @@ static void tun_flow_update(struct tun_struct *tun, u32 rxhash,
 	unsigned long delay = tun->ageing_time;
 	u16 queue_index = tfile->queue_index;
 
-	if (!rxhash)
-		return;
-	else
-		head = &tun->flows[tun_hashfn(rxhash)];
+	head = &tun->flows[tun_hashfn(rxhash)];
 
 	rcu_read_lock();
 
-- 
2.16.2