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authorDavid S. Miller <davem@davemloft.net>2018-08-09 11:52:36 -0700
committerDavid S. Miller <davem@davemloft.net>2018-08-09 11:52:36 -0700
commita736e074680745faa5dc6be8dd3c58ad4850aab9 (patch)
tree620e6d20cfce3806399fbefa8d911cc848463f9b /net/dccp
parentMerge branch 'Add-support-for-XGMAC2-in-stmmac' (diff)
parentMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 (diff)
downloadlinux-dev-a736e074680745faa5dc6be8dd3c58ad4850aab9.tar.xz
linux-dev-a736e074680745faa5dc6be8dd3c58ad4850aab9.zip
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
Overlapping changes in RXRPC, changing to ktime_get_seconds() whilst adding some tracepoints. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ccids/ccid2.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index 2b75df469220..842a9c7c73a3 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -229,14 +229,16 @@ static void ccid2_cwnd_restart(struct sock *sk, const u32 now)
struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk);
u32 cwnd = hc->tx_cwnd, restart_cwnd,
iwnd = rfc3390_bytes_to_packets(dccp_sk(sk)->dccps_mss_cache);
+ s32 delta = now - hc->tx_lsndtime;
hc->tx_ssthresh = max(hc->tx_ssthresh, (cwnd >> 1) + (cwnd >> 2));
/* don't reduce cwnd below the initial window (IW) */
restart_cwnd = min(cwnd, iwnd);
- cwnd >>= (now - hc->tx_lsndtime) / hc->tx_rto;
- hc->tx_cwnd = max(cwnd, restart_cwnd);
+ while ((delta -= hc->tx_rto) >= 0 && cwnd > restart_cwnd)
+ cwnd >>= 1;
+ hc->tx_cwnd = max(cwnd, restart_cwnd);
hc->tx_cwnd_stamp = now;
hc->tx_cwnd_used = 0;