commit fb47ddb2db9c18664bd7b06c201a2398885b64fc
author David L Stevens <dlstevens@us.ibm.com> Sun Nov 19 10:38:39 2006 -0800
committer David S. Miller <davem@sunset.davemloft.net> Tue Nov 21 16:16:33 2006 -0800
tree 15cdc75a3b671f4e066f1a4c1142ef4e52aa1c55
parent 354f60a9952d0af59e684b91cc6e06b95fbbf5ef

[IGMP]: Fix IGMPV3_EXP() normalization bit shift value.

The IGMPV3_EXP() macro doesn't correctly shift the normalization bit, so
time-out values are longer than they should be.

Thanks to Dirk Ooms for finding the problem in IGMPv3 - MLDv2 had a
similar problem that was already fixed a year ago. :-(

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/igmp.h

diff --git a/include/linux/igmp.h b/include/linux/igmp.h
index 03f43e2..21dd569 100644
--- a/include/linux/igmp.h
+++ b/include/linux/igmp.h
@@ -191,7 +191,7 @@
 #define IGMPV3_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
 #define IGMPV3_EXP(thresh, nbmant, nbexp, value) \
 	((value) < (thresh) ? (value) : \
-        ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
+        ((IGMPV3_MASK(value, nbmant) | (1<<(nbmant))) << \
          (IGMPV3_MASK((value) >> (nbmant), nbexp) + (nbexp))))
 
 #define IGMPV3_QQIC(value) IGMPV3_EXP(0x80, 4, 3, value)