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-rw-r--r--include/linux/igmp.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/igmp.h b/include/linux/igmp.h
index 03f43e2893a4..21dd56905271 100644
--- a/include/linux/igmp.h
+++ b/include/linux/igmp.h
@@ -191,7 +191,7 @@ struct ip_mc_list
#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)