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authorJohannes Berg <johannes.berg@intel.com>2010-06-10 10:21:42 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-06-14 15:39:27 -0400
commit0ab337032a0dfcd5f2527d3306d3deeba5f95b59 (patch)
tree88795edc149fd88574fece0c8f23774ee8a9155c /net/mac80211/tx.c
parenta6a67db2bc89d2b1ff07e0817f11235c20d2c329 (diff)
downloadblackbird-op-linux-0ab337032a0dfcd5f2527d3306d3deeba5f95b59.tar.gz
blackbird-op-linux-0ab337032a0dfcd5f2527d3306d3deeba5f95b59.zip
mac80211: make TX aggregation start/stop request async
When the driver or rate control requests starting or stopping an aggregation session, that currently causes a direct callback into the driver, which could potentially cause locking problems. Also, the functions need to be callable from contexts that cannot sleep, and thus will interfere with making the ampdu_action callback sleeping. To address these issues, add a new work item for each station that will process any start or stop requests out of line. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/tx.c')
-rw-r--r--net/mac80211/tx.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 7bf1f9c9ea34..698d4718b1a4 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1102,6 +1102,11 @@ static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
info->flags |= IEEE80211_TX_CTL_AMPDU;
+ } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
+ /*
+ * nothing -- this aggregation session is being started
+ * but that might still fail with the driver
+ */
} else {
spin_lock(&tx->sta->lock);
/*
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