From: Dan Carpenter <dan.carpenter@oracle.com>
To: Colin King <colin.king@canonical.com>
Cc: Eric Dumazet <edumazet@google.com>,
"David S . Miller" <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
netdev@vger.kernel.org, kernel-janitors@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tcp: remove redundant check on tskb
Date: Thu, 4 Apr 2019 18:05:09 +0300 [thread overview]
Message-ID: <20190404150508.GL32590@kadam> (raw)
In-Reply-To: <20190404144603.27682-1-colin.king@canonical.com>
On Thu, Apr 04, 2019 at 03:46:03PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> The non-null check on tskb is always false because it is in an else
> path of a check on tskb and hence tskb is null in this code block.
> This is check is therefore redundant and can be removed as well
> as the label coalesc.
>
> if (tsbk) {
> ...
> } else {
> ...
> if (unlikely(!skb)) {
> if (tskb) /* can never be true, redundant code */
> goto coalesc;
> return;
> }
> }
>
> Addresses-Coverity: ("Logically dead code")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
This was fallout from commit 75c119afe14f ("tcp: implement rb-tree based
retransmit queue").
regards,
dan carpenter
next prev parent reply other threads:[~2019-04-04 15:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-04 14:46 [PATCH] tcp: remove redundant check on tskb Colin King
2019-04-04 15:05 ` Dan Carpenter [this message]
2019-04-05 6:47 ` Mukesh Ojha
2019-04-05 7:46 ` Eric Dumazet
2019-04-07 1:18 ` David Miller
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