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| author | Johannes Berg <johannes@sipsolutions.net> | 2008-02-25 16:27:45 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-02-29 15:42:04 -0500 |
| commit | db4d1169d0b893bfb7923b6526748fe2c5a7373f (patch) | |
| tree | ebd5ac06685bacc069b162b31f99b33c6191b4c3 /net/mac80211/sta_info.c | |
| parent | 6f48422a29714ed92f6136d9e7d3ff39c75607d7 (diff) | |
| download | blackbird-op-linux-db4d1169d0b893bfb7923b6526748fe2c5a7373f.tar.gz blackbird-op-linux-db4d1169d0b893bfb7923b6526748fe2c5a7373f.zip | |
mac80211: split ieee80211_key_alloc/free
In order to RCU-ify sta_info, we need to be able to allocate
a key without linking it to an sdata/sta structure (because
allocation cannot be done in an rcu critical section). This
patch splits up ieee80211_key_alloc() and updates all users
appropriately.
While at it, this patch fixes a number of race conditions
such as finally making key replacement atomic, unfortunately
at the expense of more complex code.
Note that this patch documents /existing/ bugs with sta info
and key interaction, there is currently a race condition
when a sta info is freed without holding the RTNL. This will
finally be fixed by a followup patch.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/sta_info.c')
| -rw-r--r-- | net/mac80211/sta_info.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index c6c0df4bbd2c..e384e6632d97 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -312,7 +312,7 @@ void sta_info_free(struct sta_info *sta) #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ ieee80211_key_free(sta->key); - sta->key = NULL; + WARN_ON(sta->key); if (local->ops->sta_notify) { struct ieee80211_sub_if_data *sdata; |
