From: Yuchung Cheng <ycheng@google.com>
Date: Thu, 5 Sep 2013 22:36:09 +0000 (-0700)
Subject: tcp: fix no cwnd growth after timeout
X-Git-Tag: v3.12-rc1~109^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16edfe7ee02dd7fcc13855ea19158333529533b2;p=pandora-kernel.git

tcp: fix no cwnd growth after timeout

In commit 0f7cc9a3 "tcp: increase throughput when reordering is high",
it only allows cwnd to increase in Open state. This mistakenly disables
slow start after timeout (CA_Loss). Moreover cwnd won't grow if the
state moves from Disorder to Open later in tcp_fastretrans_alert().

Therefore the correct logic should be to allow cwnd to grow as long
as the data is received in order in Open, Loss, or even Disorder state.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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