diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-11-18 19:15:06 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-11-19 01:01:47 +0300 |
| commit | 8ade00824607fcfa8842572012d4393b40a74a94 (patch) | |
| tree | e88b9ce6d6743294e5287d6c3729bbb215cabb3e /net | |
| parent | 70e3bb504ccfe6ba725ab120bdb516d205d834f9 (diff) | |
| download | linux-8ade00824607fcfa8842572012d4393b40a74a94.tar.xz | |
mac80211: fix addba timer (again...)
commit 2171abc58644e09dbba546d91366b12743115396
Author: Johannes Berg <johannes@sipsolutions.net>
Date: Thu Oct 29 08:34:00 2009 +0100
mac80211: fix addba timer
left a problem in there, even if the timer was
never started it could be deleted and then added.
Linus pointed out that del_timer_sync() isn't
actually needed if we make the timer able to
deal with no longer being needed when it gets
queued _while_ we're in the locked section that
also deletes it. For that the timer function only
needs to check the HT_ADDBA_RECEIVED_MSK bit as
well as the HT_ADDBA_REQUESTED_MSK bit, only if
the former is clear should it do anything.
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/agg-tx.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index b09948ceec4a..206fd82f0c76 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -173,12 +173,14 @@ static void sta_addba_resp_timer_expired(unsigned long data) /* check if the TID waits for addBA response */ spin_lock_bh(&sta->lock); - if (!(*state & HT_ADDBA_REQUESTED_MSK)) { + if ((*state & (HT_ADDBA_REQUESTED_MSK | HT_ADDBA_RECEIVED_MSK)) != + HT_ADDBA_REQUESTED_MSK) { spin_unlock_bh(&sta->lock); *state = HT_AGG_STATE_IDLE; #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "timer expired on tid %d but we are not " - "expecting addBA response there", tid); + "(or no longer) expecting addBA response there", + tid); #endif return; } @@ -666,21 +668,21 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local, state = &sta->ampdu_mlme.tid_state_tx[tid]; - del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); - spin_lock_bh(&sta->lock); if (!(*state & HT_ADDBA_REQUESTED_MSK)) - goto timer_still_needed; + goto out; if (mgmt->u.action.u.addba_resp.dialog_token != sta->ampdu_mlme.tid_tx[tid]->dialog_token) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ - goto timer_still_needed; + goto out; } + del_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); + #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ @@ -699,10 +701,6 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local, ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR); } - goto out; - - timer_still_needed: - add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); out: spin_unlock_bh(&sta->lock); } |