diff options
| author |   Johannes Berg <johannes.berg@intel.com> | 2013-02-22 12:55:01 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-02-26 00:09:19 +0100 |
| commit | 1b91731d23a3dd8e8d7e3ee21b8c6d6d4cde62c1 (patch) | |
| tree | 8e4e5ecaa9429f2592905f8c019082f217682560 /net/mac80211/tx.c | |
| parent | brcmfmac: fix missing unlock on error in brcmf_notify_vif_event() (diff) | |
| download | linux-dev-1b91731d23a3dd8e8d7e3ee21b8c6d6d4cde62c1.tar.xz linux-dev-1b91731d23a3dd8e8d7e3ee21b8c6d6d4cde62c1.zip | |
mac80211: fix tim_lock locking
The ieee80211_beacon_add_tim() function might be called
by drivers with BHs enabled, which causes a potential
deadlock if TX happens at the same time and attempts to
lock the tim_lock as well. Use spin_lock_bh to fix it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 5b9602b62405..5800c7a0d075 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2360,9 +2360,9 @@ static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, if (local->tim_in_locked_section) { __ieee80211_beacon_add_tim(sdata, ps, skb); } else { - spin_lock(&local->tim_lock); + spin_lock_bh(&local->tim_lock); __ieee80211_beacon_add_tim(sdata, ps, skb); - spin_unlock(&local->tim_lock); + spin_unlock_bh(&local->tim_lock); } return 0; |