diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2007-09-18 17:29:21 -0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:53:00 -0700 |
| commit | 79010420cc3f78eab911598bfdd29c4b06a83e1f (patch) | |
| tree | a9031164d7944f8aa90a455d297780b241f3d865 /net/mac80211/ieee80211_i.h | |
| parent | ea49c359f36d5b40bf033c45a08332cb73777aa2 (diff) | |
[PATCH] mac80211: fix virtual interface locking
Florian Lohoff noticed a bug in mac80211: when bringing the
master interface down while other virtual interfaces are up
we call dev_close() under a spinlock which is not allowed.
This patch removes the sub_if_lock used by mac80211 in favour
of using an RCU list. All list manipulations are already done
under rtnl so are well protected against each other, and the
read-side locks we took in the RX and TX code are already in
RCU read-side critical sections.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Florian Lohoff <flo@rfc822.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: Satyam Sharma <satyam@infradead.org>
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/ieee80211_i.h')
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 1a43f3e9b6bd..a5961f16f206 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -475,9 +475,8 @@ struct ieee80211_local { ieee80211_rx_handler *rx_handlers; ieee80211_tx_handler *tx_handlers; - rwlock_t sub_if_lock; /* Protects sub_if_list. Cannot be taken under - * sta_bss_lock or sta_lock. */ - struct list_head sub_if_list; + struct list_head interfaces; + int sta_scanning; int scan_channel_idx; enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state; |