tcp: consistently check retransmit hint
authorYuchung Cheng <ycheng@google.com>
Fri, 25 Sep 2020 17:04:28 +0000 (10:04 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sat, 26 Sep 2020 00:17:14 +0000 (17:17 -0700)
commite5dd783b7765f3f41043d7e519a9640b74ddddf6
tree74b07d29dec1e051a9481eb7bbc5954185576c76
parentc8cf959b96373409ede47375afedf414baadac8c
tcp: consistently check retransmit hint

tcp_simple_retransmit() used for path MTU discovery may not adjust
the retransmit hint properly by deducting retrans_out before checking
it to adjust the hint. This patch fixes this by a correct routine
tcp_mark_skb_lost() already used by the RACK loss detection.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_input.c
net/ipv4/tcp_recovery.c