From 9febfa67ca1566294ea5fd1f95ebf02181e7a233 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 25 Apr 2018 11:11:22 +0200 Subject: mt76: add rcu locking in tid reorder function Avoids having the tid or station entry disappear prematurely. Also cancel the reorder work earlier to avoid further processing delayed by waiting for the lock to be released Signed-off-by: Felix Fietkau Signed-off-by: Kalle Valo --- drivers/net/wireless/mediatek/mt76/agg-rx.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/net/wireless/mediatek/mt76') diff --git a/drivers/net/wireless/mediatek/mt76/agg-rx.c b/drivers/net/wireless/mediatek/mt76/agg-rx.c index dbf4057d2d3e..b67acc6189bf 100644 --- a/drivers/net/wireless/mediatek/mt76/agg-rx.c +++ b/drivers/net/wireless/mediatek/mt76/agg-rx.c @@ -103,6 +103,7 @@ mt76_rx_aggr_reorder_work(struct work_struct *work) __skb_queue_head_init(&frames); local_bh_disable(); + rcu_read_lock(); spin_lock(&tid->lock); mt76_rx_aggr_check_release(tid, &frames); @@ -114,6 +115,7 @@ mt76_rx_aggr_reorder_work(struct work_struct *work) REORDER_TIMEOUT); mt76_rx_complete(dev, &frames, -1); + rcu_read_unlock(); local_bh_enable(); } @@ -266,6 +268,8 @@ static void mt76_rx_aggr_shutdown(struct mt76_dev *dev, struct mt76_rx_tid *tid) u8 size = tid->size; int i; + cancel_delayed_work(&tid->reorder_work); + spin_lock_bh(&tid->lock); tid->stopped = true; @@ -280,8 +284,6 @@ static void mt76_rx_aggr_shutdown(struct mt76_dev *dev, struct mt76_rx_tid *tid) } spin_unlock_bh(&tid->lock); - - cancel_delayed_work(&tid->reorder_work); } void mt76_rx_aggr_stop(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tidno) -- cgit v1.2.3