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Subject[PATCH][net-next] tcp: remove the now redundant non-null check on tskb
Date
From: Colin Ian King <colin.king@canonical.com>

The non-null check on tskb is redundant as it is in an else
section of a check on tskb where tskb is always null. Remove
the redundant if statement and the label coalesce.

Detected by CoverityScan, CID#1457751 ("Logically dead code")

Fixes: 75c119afe14f ("tcp: implement rb-tree based retransmit queue")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
net/ipv4/tcp_output.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 071bdd34f8eb..b58c986b2b27 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -3053,7 +3053,6 @@ void tcp_send_fin(struct sock *sk)
tskb = skb_rb_last(&sk->tcp_rtx_queue);

if (tskb) {
-coalesce:
TCP_SKB_CB(tskb)->tcp_flags |= TCPHDR_FIN;
TCP_SKB_CB(tskb)->end_seq++;
tp->write_seq++;
@@ -3069,11 +3068,8 @@ void tcp_send_fin(struct sock *sk)
}
} else {
skb = alloc_skb_fclone(MAX_TCP_HEADER, sk->sk_allocation);
- if (unlikely(!skb)) {
- if (tskb)
- goto coalesce;
+ if (unlikely(!skb))
return;
- }
INIT_LIST_HEAD(&skb->tcp_tsorted_anchor);
skb_reserve(skb, MAX_TCP_HEADER);
sk_forced_mem_schedule(sk, skb->truesize);
--
2.14.1
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