From: Johannes Berg <johannes.b...@intel.com>
There's no need to re-lookup the data structures now that
we actually get them immediately with from_timer(), just
avoid that. The struct has to be valid anyway, otherwise
the timer object itself would no longer be valid, and we
can't have a different version of the struct since only a
single session per TID is permitted.
Signed-off-by: Johannes Berg <johannes.b...@intel.com>
---
net/mac80211/agg-rx.c | 17 +++--------------
net/mac80211/agg-tx.c | 31 ++++++++-----------------------
2 files changed, 11 insertions(+), 37 deletions(-)
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index d444752dbf40..35e94483fb8c 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -153,27 +153,16 @@ EXPORT_SYMBOL(ieee80211_stop_rx_ba_session);
*/
static void sta_rx_agg_session_timer_expired(struct timer_list *t)
{
- struct tid_ampdu_rx *tid_rx_timer =
- from_timer(tid_rx_timer, t, session_timer);
- struct sta_info *sta = tid_rx_timer->sta;
- u8 tid = tid_rx_timer->tid;
- struct tid_ampdu_rx *tid_rx;
+ struct tid_ampdu_rx *tid_rx = from_timer(tid_rx, t, session_timer);
+ struct sta_info *sta = tid_rx->sta;
+ u8 tid = tid_rx->tid;
unsigned long timeout;
- rcu_read_lock();
- tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
- if (!tid_rx) {
- rcu_read_unlock();
- return;
- }
-
timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout);
if (time_is_after_jiffies(timeout)) {
mod_timer(&tid_rx->session_timer, timeout);
- rcu_read_unlock();
return;
}
- rcu_read_unlock();
ht_dbg(sta->sdata, "RX session timer expired on %pM tid %d\n",
sta->sta.addr, tid);
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index 3680b380e70c..1d0bf857a3b5 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -424,18 +424,12 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta,
u16 tid,
*/
static void sta_addba_resp_timer_expired(struct timer_list *t)
{
- struct tid_ampdu_tx *tid_tx_timer =
- from_timer(tid_tx_timer, t, addba_resp_timer);
- struct sta_info *sta = tid_tx_timer->sta;
- u8 tid = tid_tx_timer->tid;
- struct tid_ampdu_tx *tid_tx;
+ struct tid_ampdu_tx *tid_tx = from_timer(tid_tx, t, addba_resp_timer);
+ struct sta_info *sta = tid_tx->sta;
+ u8 tid = tid_tx->tid;
/* check if the TID waits for addBA response */
- rcu_read_lock();
- tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
- if (!tid_tx ||
- test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) {
- rcu_read_unlock();
+ if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) {
ht_dbg(sta->sdata,
"timer expired on %pM tid %d not expecting addBA
response\n",
sta->sta.addr, tid);
@@ -446,7 +440,6 @@ static void sta_addba_resp_timer_expired(struct timer_list
*t)
sta->sta.addr, tid);
ieee80211_stop_tx_ba_session(&sta->sta, tid);
- rcu_read_unlock();
}
void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
@@ -524,29 +517,21 @@ void ieee80211_tx_ba_session_handle_start(struct sta_info
*sta, int tid)
*/
static void sta_tx_agg_session_timer_expired(struct timer_list *t)
{
- struct tid_ampdu_tx *tid_tx_timer =
- from_timer(tid_tx_timer, t, session_timer);
- struct sta_info *sta = tid_tx_timer->sta;
- u8 tid = tid_tx_timer->tid;
- struct tid_ampdu_tx *tid_tx;
+ struct tid_ampdu_tx *tid_tx = from_timer(tid_tx, t, session_timer);
+ struct sta_info *sta = tid_tx->sta;
+ u8 tid = tid_tx->tid;
unsigned long timeout;
- rcu_read_lock();
- tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
- if (!tid_tx || test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
- rcu_read_unlock();
+ if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
return;
}
timeout = tid_tx->last_tx + TU_TO_JIFFIES(tid_tx->timeout);
if (time_is_after_jiffies(timeout)) {
mod_timer(&tid_tx->session_timer, timeout);
- rcu_read_unlock();
return;
}
- rcu_read_unlock();
-
ht_dbg(sta->sdata, "tx session timer expired on %pM tid %d\n",
sta->sta.addr, tid);
--
2.14.2
