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linux/net/mac80211
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Andrew Pope a007a384c9 wifi: mac80211: recalculate TIM when a station enters power save 
When an AP buffers frames for a station on its per-station TXQs and the
station subsequently enters power save, sta_ps_start() records the
buffered TIDs in txq_buffered_tids but does not update the TIM. The
station's TIM bit is only ever set when a further frame is buffered
while the station is already asleep
(ieee80211_tx_h_unicast_ps_buf() -> sta_info_recalc_tim()).

If no further downlink frame arrives for that station the beacon
TIM never advertises the buffered traffic. A station relying on the
TIM then remains in doze indefinitely on top of a non-empty queue. Its
TXQs were removed from the scheduler's active list at PS entry, nothing
pages it, and the flow deadlocks until an unrelated event wakes the
station.

Recalculate the TIM at the end of sta_ps_start(), so traffic
already buffered at PS entry is advertised immediately.
sta_info_recalc_tim() already consults txq_buffered_tids, which is
updated above, and is safe in this context (it is already called
from equivalent paths such as the tx handlers and
ieee80211_handle_filtered_frame()).

Fixes: ba8c3d6f16 ("mac80211: add an intermediate software queue implementation")
Signed-off-by: Andrew Pope <andrew.pope@morsemicro.com>
Link: https://patch.msgid.link/20260717011751.79524-1-andrew.pope@morsemicro.com
[add wifi: subject prefix]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2026-07-21 13:35:22 +02:00
..
tests wifi: mac80211: parse and apply UHR DBE channel 2026-06-03 14:11:58 +02:00
aead_api.c mac80211: Check crypto_aead_encrypt for errors 2021-03-16 21:20:41 +01:00
aead_api.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
aes_ccm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
aes_cmac.c wifi: mac80211: Use AES-CMAC library in ieee80211_aes_cmac() 2026-03-09 13:27:21 -07:00
aes_cmac.h wifi: mac80211: Use AES-CMAC library in ieee80211_aes_cmac() 2026-03-09 13:27:21 -07:00
aes_gcm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
aes_gmac.c wifi: mac80211: utilize the newly defined CMAC constants 2025-11-20 11:56:19 +01:00
aes_gmac.h wifi: mac80211: utilize the newly defined CMAC constants 2025-11-20 11:56:19 +01:00
agg-rx.c wifi: mac80211: fold tid_ampdu_rx allocations into a flexible array 2026-06-05 09:59:30 +02:00
agg-tx.c wifi: mac80211: allow block ack agreements in NAN Data 2026-04-07 15:36:04 +02:00
airtime.c wifi: mac80211: introduce EHT rate support in AQL airtime 2024-09-06 12:58:36 +02:00
ap.c wifi: mac80211: AP: handle DBE for clients 2026-06-03 14:11:58 +02:00
cfg.c wifi: mac80211: copy aggregation information 2026-07-21 13:25:45 +02:00
chan.c wifi: mac80211: remove 5/10 MHz channel code 2026-06-03 14:07:06 +02:00
debug.h wifi: mac80211: don't WARN for late channel/color switch 2025-06-17 14:30:06 +02:00
debugfs_key.c wifi: mac80211: Clean up debugfs_key deadcode 2025-01-13 13:51:19 +01:00
debugfs_key.h wifi: mac80211: Clean up debugfs_key deadcode 2025-01-13 13:51:19 +01:00
debugfs_netdev.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
debugfs_netdev.h wifi: mac80211: fix driver debugfs for vif type change 2024-02-02 13:09:55 +01:00
debugfs_sta.c wifi: mac80211: Remove redundant rcu_read_lock/unlock() in spin_lock 2025-09-19 11:48:14 +02:00
debugfs_sta.h wifi: mac80211: add API to show the link STAs in debugfs 2022-10-07 15:23:41 +02:00
debugfs.c wifi: mac80211: use kstrtobool_from_user() in debugfs callbacks 2026-04-28 09:31:27 +02:00
debugfs.h
driver-ops.c wifi: mac80211: make monitor link info check more specific 2025-11-11 11:05:19 +01:00
driver-ops.h wifi: mac80211: add NAN peer schedule support 2026-04-07 15:36:03 +02:00
drop.h wifi: mac80211: remove RX_DROP 2026-01-19 10:21:47 +01:00
eht.c wifi: mac80211: move frame RX handling to type files 2026-05-05 14:49:01 +02:00
ethtool.c wifi: mac80211: add tx_handlers_drop statistics to ethtool 2025-09-10 15:04:27 +02:00
fils_aead.c wifi: mac80211: Use AES-CMAC library in aes_s2v() 2026-03-09 13:27:21 -07:00
fils_aead.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
he.c wifi: mac80211: refactor link STA bandwidth update 2026-06-03 14:11:58 +02:00
ht.c wifi: mac80211: refactor link STA bandwidth update 2026-06-03 14:11:58 +02:00
ibss.c wifi: mac80211: ibss: wait for in-flight TX on disconnect 2026-07-07 09:28:55 +02:00
ieee80211_i.h wifi: mac80211: AP: handle DBE for clients 2026-06-03 14:11:58 +02:00
iface.c wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock 2026-07-07 09:23:23 +02:00
Kconfig wifi: mac80211: Use AES-CMAC library in aes_s2v() 2026-03-09 13:27:21 -07:00
key.c wifi: mac80211: allow cipher change on NAN_DATA interfaces 2026-05-20 12:03:38 +02:00
key.h wifi: mac80211: Use AES-CMAC library in ieee80211_aes_cmac() 2026-03-09 13:27:21 -07:00
led.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
led.h leds: Change led_trigger_blink[_oneshot]() delay parameters to pass-by-value 2023-05-25 12:16:27 +01:00
link.c wifi: mac80211: tear down new links on vif update error path 2026-07-21 13:05:32 +02:00
main.c wifi: mac80211: fix memory leak in ieee80211_register_hw() 2026-07-07 09:25:05 +02:00
Makefile wifi: mac80211: move frame RX handling to type files 2026-05-05 14:49:01 +02:00
mesh_hwmp.c wifi: mac80211: Fix -Wc23-extensions in hwmp_route_info_get() 2026-06-05 09:55:08 +02:00
mesh_pathtbl.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
mesh_plink.c wifi: mac80211: remove 5/10 MHz channel code 2026-06-03 14:07:06 +02:00
mesh_ps.c wifi: mac80211: support parsing S1G TIM PVB 2025-09-04 11:19:01 +02:00
mesh_sync.c wifi: mac80211: export ieee80211_calculate_rx_timestamp 2026-04-07 15:36:02 +02:00
mesh.c wifi: mac80211: remove 5/10 MHz channel code 2026-06-03 14:07:06 +02:00
mesh.h wifi: mac80211: split mesh fast tx cache into local/proxied/forwarded 2024-04-17 09:21:32 +02:00
mlme.c wifi: mac80211: validate deauth frame length before reason access 2026-07-06 14:11:11 +02:00
nan.c wifi: mac80211: allocate backup ieee80211_nan_sched_cfg off stack 2026-07-06 10:07:11 +02:00
ocb.c wifi: mac80211: clean up initial STA NSS/bandwidth handling 2026-04-28 09:27:46 +02:00
offchannel.c wifi: mac80211: remove 5/10 MHz channel code 2026-06-03 14:07:06 +02:00
parse.c wifi: mac80211: always expose multi-link element 2026-06-03 14:11:57 +02:00
pm.c wifi: cfg80211/mac80211: Add support to get radio index 2025-06-24 15:19:27 +02:00
rate.c wifi: mac80211: remove 5/10 MHz channel code 2026-06-03 14:07:06 +02:00
rate.h wifi: mac80211: convert debugfs files to short fops 2024-10-23 16:47:07 +02:00
rc80211_minstrel_ht_debugfs.c [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
rc80211_minstrel_ht.c wifi: mac80211: remove unused variables in minstrel_ht_alloc_sta 2026-04-07 15:40:25 +02:00
rc80211_minstrel_ht.h wifi: mac80211: minstrel_ht: remove unused has_mrr member from struct minstrel_priv 2022-10-07 15:25:05 +02:00
rx.c wifi: mac80211: recalculate TIM when a station enters power save 2026-07-21 13:35:22 +02:00
s1g.c wifi: mac80211: add support for NDP ADDBA/DELBA for S1G 2026-03-06 10:52:11 +01:00
scan.c wifi: mac80211: export ieee80211_calculate_rx_timestamp 2026-04-07 15:36:02 +02:00
spectmgmt.c wifi: mac80211: remove 5/10 MHz channel code 2026-06-03 14:07:06 +02:00
sta_info.c wifi: mac80211: defer link RX stats percpu free to RCU 2026-07-06 14:11:07 +02:00
sta_info.h wifi: mac80211: fold tid_ampdu_rx allocations into a flexible array 2026-06-05 09:59:30 +02:00
status.c wifi: mac80211: parse and apply UHR DBE channel 2026-06-03 14:11:58 +02:00
tdls.c wifi: mac80211: clarify per-STA bandwidth handling 2026-04-28 09:29:02 +02:00
tkip.c Merge net-next/main to resolve conflicts 2024-10-09 08:59:22 +02:00
tkip.h Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-08 20:57:08 -07:00
trace_msg.h wifi: mac80211: remove unused MAX_MSG_LEN define 2024-02-08 12:50:09 +01:00
trace.c
trace.h wifi: mac80211: add NPCA to chandef tracing 2026-05-05 14:49:03 +02:00
tx.c wifi: mac80211: free ack status frame on TX header build failure 2026-07-06 14:11:07 +02:00
uhr.c wifi: mac80211: update UHR capabilities field order 2026-05-05 14:49:01 +02:00
util.c wifi: mac80211: validate extension-frame layout before RX 2026-07-06 14:11:09 +02:00
vht.c wifi: mac80211: clarify per-STA bandwidth handling 2026-04-28 09:29:02 +02:00
wbrf.c wifi: mac80211: use cfg80211_chandef_get_width() 2025-03-12 09:50:27 +01:00
wep.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
wep.h mac80211: make ieee80211_wep_init() return void 2020-02-07 12:40:34 +01:00
wme.c wifi: mac80211: fix qos on mesh interfaces 2023-03-22 13:46:38 +01:00
wme.h wifi: mac80211: Drop support for TX push path 2022-10-10 11:06:14 +02:00
wpa.c Networking changes for 7.1. 2026-04-14 18:36:10 -07:00
wpa.h wifi: mac80211: refactor CMAC packet handlers 2025-11-20 11:56:19 +01:00