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We have only a few fixes right now:

Browse source 
* a fix for an issue with hash collision handling in the
    rhashtable conversion
  * a merge issue - rhashtable removed default shrinking
    just before mac80211 was converted, so enable it now
  * remove an invalid WARN that can trigger with legitimate
    userspace behaviour
  * add a struct member missing from kernel-doc that caused
    a lot of warnings
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Merge tag 'mac80211-for-davem-2015-05-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
We have only a few fixes right now:
 * a fix for an issue with hash collision handling in the
   rhashtable conversion
 * a merge issue - rhashtable removed default shrinking
   just before mac80211 was converted, so enable it now
 * remove an invalid WARN that can trigger with legitimate
   userspace behaviour
 * add a struct member missing from kernel-doc that caused
   a lot of warnings
====================

Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David S. Miller 2015-05-04 16:00:55 -04:00
commit b7ba7b469a
3 changed files with 27 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

12
net/mac80211/iface.c
View file

@ -819,13 +819,15 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
* (because if we remove a STA after ops->remove_interface()
* the driver will have removed the vif info already!)
*
* This is relevant only in WDS mode, in all other modes we've
* already removed all stations when disconnecting or similar,
* so warn otherwise.
* In WDS mode a station must exist here and be flushed, for
* AP_VLANs stations may exist since there's nothing else that
* would have removed them, but in other modes there shouldn't
* be any stations.
*/
flushed = sta_info_flush(sdata);
WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
(sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
(sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
/* don't count this interface for promisc/allmulti while it is down */
if (sdata->flags & IEEE80211_SDATA_ALLMULTI)

19
net/mac80211/sta_info.c
View file

@ -66,6 +66,7 @@
static const struct rhashtable_params sta_rht_params = {
.nelem_hint = 3, /* start small */
.automatic_shrinking = true,
.head_offset = offsetof(struct sta_info, hash_node),
.key_offset = offsetof(struct sta_info, sta.addr),
.key_len = ETH_ALEN,
@ -157,8 +158,24 @@ struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
const u8 *addr)
{
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
struct rhash_head *tmp;
const struct bucket_table *tbl;
return rhashtable_lookup_fast(&local->sta_hash, addr, sta_rht_params);
rcu_read_lock();
tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
for_each_sta_info(local, tbl, addr, sta, tmp) {
if (sta->sdata == sdata) {
rcu_read_unlock();
/* this is safe as the caller must already hold
* another rcu read section or the mutex
*/
return sta;
}
}
rcu_read_unlock();
return NULL;
}
/*