From 04e35caa32ec9aae6b306d07f07dc2ee6d69166c Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 25 Jul 2020 10:45:33 +0200 Subject: mac80211: remove STA txq pending airtime underflow warning This warning can trigger if there is a mismatch between frames that were sent with the sta pointer set vs tx status frames reported for the sta address. This can happen due to race conditions on re-creating stations, or even in the case of .sta_add/remove being used instead of .sta_state, which can cause frames to be sent to a station that has not been uploaded yet. If there is an actual underflow issue, it should show up in the device airtime warning below, so it is better to remove this one. Signed-off-by: Felix Fietkau Link: https://lore.kernel.org/r/20200725084533.13829-1-nbd@nbd.name Signed-off-by: Johannes Berg --- net/mac80211/sta_info.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index cd8487bc6fc2..af4cc5fb678e 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -1923,9 +1923,7 @@ void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local, if (sta) { tx_pending = atomic_sub_return(tx_airtime, &sta->airtime[ac].aql_tx_pending); - if (WARN_ONCE(tx_pending < 0, - "STA %pM AC %d txq pending airtime underflow: %u, %u", - sta->addr, ac, tx_pending, tx_airtime)) + if (tx_pending < 0) atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending, tx_pending, 0); } -- cgit v1.2.3