backports: fix events with extack backport

The multicast group offset needs to be synced after registering the
family, otherwise multicast messages will use the wrong id

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/backport/compat/backport-4.12.c b/backport/compat/backport-4.12.c
index f997b6c5161db494f9157834be28fe576eece8dd..5e7630845a10308aa68e3aabdbd745b9ed1883cd 100644 (file)
--- a/backport/compat/backport-4.12.c
+++ b/backport/compat/backport-4.12.c
@@ -224,6 +224,7 @@ int bp_extack_genl_register_family(struct genl_family *family)
 
        /* copy this since the family might access it directly */
        family->attrbuf = copy->family.attrbuf;
+       family->mcgrp_offset = copy->family.mcgrp_offset;
 
        mutex_lock(&copies_mutex);
        list_add_tail(&copy->list, &copies_list);