[patch 10/38] TCP: Fix a bug in strategy_allowed_congestion_control

[Greg KH]

2.6.24-stable review patch.  If anyone has any objections, please let us
know.

------------------
 
 Upstream commit: 16ca3f913001efdb6171a2781ef41c77474e3895

In strategy_allowed_congestion_control of the 2.6.24 kernel, when
sysctl_string return 1 on success,it should call
tcp_set_allowed_congestion_control to set the allowed congestion
control.But, it don't.  the sysctl_string return 1 on success,
otherwise return negative, never return 0.The patch fix the problem.

Signed-off-by: Shan Wei <shanwei@xxxxxxxxxxxxxx>
Acked-by: Stephen Hemminger <shemminger@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 net/ipv4/sysctl_net_ipv4.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -248,7 +248,7 @@ static int strategy_allowed_congestion_c
 
 	tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
 	ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
-	if (ret == 0 && newval && newlen)
+	if (ret == 1 && newval && newlen)
 		ret = tcp_set_allowed_congestion_control(tbl.data);
 	kfree(tbl.data);
 

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