diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-01-24 00:54:03 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-01-30 00:01:45 +0300 |
| commit | c771c9d8da1e8292ef8bf7fd4ce135dacc650130 (patch) | |
| tree | 79b259a6b0396cbecf9e775c7ba5a80e2c4d94c9 /net/mac80211/main.c | |
| parent | 506d03f97d10e54fd27c58c872a98242326d6419 (diff) | |
| download | linux-c771c9d8da1e8292ef8bf7fd4ce135dacc650130.tar.xz | |
mac80211: add interface list lock
Using only the RTNL has a number of problems, most notably that
ieee80211_iterate_active_interfaces() and other interface list
traversals cannot be done from the internal workqueue because it
needs to be flushed under the RTNL.
This patch introduces a new mutex that protects the interface list
against modifications. A more detailed explanation is part of the
code change.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/main.c')
| -rw-r--r-- | net/mac80211/main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 210dfe3cf6c3..a109c06e8e4e 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -758,6 +758,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, local->hw.conf.radio_enabled = true; INIT_LIST_HEAD(&local->interfaces); + mutex_init(&local->iflist_mtx); spin_lock_init(&local->key_lock); @@ -1008,6 +1009,8 @@ void ieee80211_free_hw(struct ieee80211_hw *hw) { struct ieee80211_local *local = hw_to_local(hw); + mutex_destroy(&local->iflist_mtx); + wiphy_free(local->hw.wiphy); } EXPORT_SYMBOL(ieee80211_free_hw); |