diff options
| author |   Felix Fietkau <nbd@nbd.name> | 2019-10-07 15:30:18 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2019-11-20 13:23:50 +0100 |
| commit | fb7d95c6ee4f71ba131c9b3c65d658369ffd1128 (patch) | |
| tree | 008a6291b79cc55c0fc82785f58dbe6bc7eb485c /drivers/net/wireless | |
| parent | mt76: add missing locking around ampdu action (diff) | |
| download | linux-dev-fb7d95c6ee4f71ba131c9b3c65d658369ffd1128.tar.xz linux-dev-fb7d95c6ee4f71ba131c9b3c65d658369ffd1128.zip | |
mt76: drop rcu read lock in mt76_rx_aggr_stop
A rcu read locked section is not allowed to sleep, and the rcu lock here
isn't actually necessary, because we're holding dev->mutex.
Fixes an issue when the tid work item is still running while freeing
a station or stopping the aggregation session
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/agg-rx.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/agg-rx.c b/drivers/net/wireless/mediatek/mt76/agg-rx.c index 2276fd4e9ec3..b05d439dca3b 100644 --- a/drivers/net/wireless/mediatek/mt76/agg-rx.c +++ b/drivers/net/wireless/mediatek/mt76/agg-rx.c @@ -277,17 +277,13 @@ static void mt76_rx_aggr_shutdown(struct mt76_dev *dev, struct mt76_rx_tid *tid) void mt76_rx_aggr_stop(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tidno) { - struct mt76_rx_tid *tid; - - rcu_read_lock(); + struct mt76_rx_tid *tid = NULL; - tid = rcu_dereference(wcid->aggr[tidno]); + rcu_swap_protected(wcid->aggr[tidno], tid, + lockdep_is_held(&dev->mutex)); if (tid) { - rcu_assign_pointer(wcid->aggr[tidno], NULL); mt76_rx_aggr_shutdown(dev, tid); kfree_rcu(tid, rcu_head); } - - rcu_read_unlock(); } EXPORT_SYMBOL_GPL(mt76_rx_aggr_stop); |