mac80211: ensure no limits on station rhashtable

By default, the rhashtable logic will fail to insert
objects if the key-chains are too long and un-balanced.

In the degenerate case where mac80211 is creating many
virtual interfaces connected to the same peer(s), this
case can happen.

St insecure_elasticity to true to allow chains to grow
as long as needed.

Signed-off-by: Ben Greear <greearb@candelatech.com>
[remove message, change commit message slightly]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 18b56d7a2dbd05847c12acb2700e6f78219f167c..861b93ffbe92dda5dd234b6aa27a99795f6381ae 100644 (file)
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -67,6 +67,7 @@
 
 static const struct rhashtable_params sta_rht_params = {
        .nelem_hint = 3, /* start small */
+       .insecure_elasticity = true, /* Disable chain-length checks. */
        .automatic_shrinking = true,
        .head_offset = offsetof(struct sta_info, hash_node),
        .key_offset = offsetof(struct sta_info, addr),