netdev - [PATCH] tun: Remove unnecessary BUG_ON check in tun_net

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Date:   Fri, 21 Feb 2020 12:53:09 -0700
From:   David Ahern <dsahern@...nel.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        David Ahern <dsahern@...il.com>,
        Jason Wang <jasowang@...hat.com>
Subject: [PATCH] tun: Remove unnecessary BUG_ON check in tun_net_xmit

From: David Ahern <dsahern@...il.com>

The BUG_ON for NULL tfile is now redundant due to a recently
added null check after the rcu_dereference. Remove the BUG_ON.

Cc: Jason Wang <jasowang@...hat.com>
Signed-off-by: David Ahern <dsahern@...il.com>
---
 drivers/net/tun.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 650c937ed56b..79f248cb282d 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1078,8 +1078,6 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	tun_debug(KERN_INFO, tun, "tun_net_xmit %d\n", skb->len);
 
-	BUG_ON(!tfile);
-
 	/* Drop if the filter does not like it.
 	 * This is a noop if the filter is disabled.
 	 * Filter can be enabled only for the TAP devices. */
-- 
2.17.1