[patch 10/14] ath9k: Use tasklet_disable_in_atomic()
From: Thomas Gleixner <hidden>
Date: 2021-03-09 08:46:45
Also in:
linux-pci, linux-wireless, lkml, netdev
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
All callers of ath9k_beacon_ensure_primary_slot() are preemptible /
acquire a mutex except for this callchain:
spin_lock_bh(&sc->sc_pcu_lock);
ath_complete_reset()
-> ath9k_calculate_summary_state()
-> ath9k_beacon_ensure_primary_slot()
It's unclear how that can be distangled, so use tasklet_disable_in_atomic()
for now. This allows tasklet_disable() to become sleepable once the
remaining atomic users are cleaned up.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <redacted>
Cc: ath9k-devel@qca.qualcomm.com
Cc: Kalle Valo <redacted>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
---
drivers/net/wireless/ath/ath9k/beacon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c@@ -251,7 +251,7 @@ void ath9k_beacon_ensure_primary_slot(st int first_slot = ATH_BCBUF; int slot; - tasklet_disable(&sc->bcon_tasklet); + tasklet_disable_in_atomic(&sc->bcon_tasklet); /* Find first taken slot. */ for (slot = 0; slot < ATH_BCBUF; slot++) {