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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2008-12-06 09:49:37 +0300
committerDavid S. Miller <davem@davemloft.net>2008-12-06 09:56:07 +0300
commita2acde07711f7d8b19928245c555bce60f91482a (patch)
tree8632a450cff2f211f7c5a9f1a494aed47081fae7
parentd5dd9175bc12015ea4d2c1a9b6b15dfa645a3db9 (diff)
downloadlinux-a2acde07711f7d8b19928245c555bce60f91482a.tar.xz
tcp: fix tso_should_defer in 64bit
Since jiffies is unsigned long, the types get expanded into that and after long enough time the difference will therefore always be > 1 (and that probably happens near boot as well as iirc the first jiffies wrap is scheduler close after boot to find out problems related to that early). This was originally noted by Bill Fink in Dec'07 but nobody never ended fixing it. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/tcp_output.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index e65c114feea2..dda42f0bd7a3 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1334,7 +1334,7 @@ static int tcp_tso_should_defer(struct sock *sk, struct sk_buff *skb)
/* Defer for less than two clock ticks. */
if (tp->tso_deferred &&
- ((jiffies << 1) >> 1) - (tp->tso_deferred >> 1) > 1)
+ (((u32)jiffies << 1) >> 1) - (tp->tso_deferred >> 1) > 1)
goto send_now;
in_flight = tcp_packets_in_flight(tp);