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f6c7f03f69
linux_dsm_epyc7002/net/mac80211
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Emmanuel Grumbach f6c7f03f69 mac80211: fix deauth TX when we disconnect 
The iTXQs stop/wake queue mechanism involves a whole bunch
of locks and this is probably why the call to
ieee80211_wake_txqs is deferred to a tasklet when called from
__ieee80211_wake_queue.

Another advantage of that is that ieee80211_wake_txqs might
call the wake_tx_queue() callback and then the driver may
call mac80211 which will call it back in the same context.

The bug I saw is that when we send a deauth frame as a
station we do:

flush(drop=1)
tx deauth
flush(drop=0)

While we flush we stop the queues and wake them up
immediately after we finished flushing. The problem here is
that the tasklet that de-facto enables the queue may not have
run until we send the deauth. Then the deauth frame is sent
to the driver (which is surprising by itself), but the driver
won't get anything useful from ieee80211_tx_dequeue because
the queue is stopped (or more precisely because
vif->txqs_stopped[0] is true).
Then the deauth is not sent. Later on, the tasklet will run,
but that'll be too late. We'll already have removed all the
vif etc...

Fix this by calling ieee80211_wake_txqs synchronously if we
are not waking up the queues from the driver (we check the
reason to determine that). This makes the code really
convoluted because we may call ieee80211_wake_txqs from
__ieee80211_wake_queue. The latter assumes that
queue_stop_reason_lock has been taken by the caller and
ieee80211_wake_txqs may release the lock to send the frames.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-12-05 15:34:59 +01:00
..
aead_api.c mac80211: use crypto_aead_authsize() 2017-10-11 15:46:45 +02:00
aead_api.h mac80211: aead api to reduce redundancy 2017-10-11 09:37:35 +02:00
aes_ccm.h mac80211: aead api to reduce redundancy 2017-10-11 09:37:35 +02:00
aes_cmac.c mac80211: aes-cmac: switch to shash CMAC driver 2017-02-08 09:19:33 +01:00
aes_cmac.h mac80211: aes-cmac: switch to shash CMAC driver 2017-02-08 09:19:33 +01:00
aes_gcm.h mac80211: aead api to reduce redundancy 2017-10-11 09:37:35 +02:00
aes_gmac.c mac80211: move struct aead_req off the stack 2016-10-17 16:14:04 +02:00
aes_gmac.h mac80211: move struct aead_req off the stack 2016-10-17 16:14:04 +02:00
agg-rx.c mac80211: add support for HE 2018-06-18 22:40:32 +02:00
agg-tx.c mac80211: add support for HE 2018-06-18 22:40:32 +02:00
cfg.c {nl,mac}80211: add dot11MeshConnectedToMeshGate to meshconf 2018-11-09 11:39:44 +01:00
chan.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugfs_key.c mac80211: move TKIP TX IVs to public part of key struct 2016-02-24 09:04:38 +01:00
debugfs_key.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugfs_netdev.c {nl,mac}80211: add dot11MeshConnectedToMeshGate to meshconf 2018-11-09 11:39:44 +01:00
debugfs_netdev.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugfs_sta.c mac80211: debugfs: avoid variable shadowing 2018-11-09 11:14:51 +01:00
debugfs_sta.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugfs.c mac80211: add an option for station management TXQ 2018-09-05 10:10:11 +02:00
debugfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
driver-ops.c mac80211: add offset_tsf driver op and use it for mesh 2016-09-30 13:45:44 +02:00
driver-ops.h mac80211: allow drivers to use peer measurement API 2018-11-09 11:20:34 +01:00
ethtool.c mac80211: use BIT_ULL for NL80211_STA_INFO_* attribute types 2018-06-29 09:53:09 +02:00
fils_aead.c Some more updates: 2017-02-10 14:31:51 -05:00
fils_aead.h mac80211: FILS AEAD protection for station mode association frames 2016-10-27 16:03:25 +02:00
he.c mac80211: add support for HE 2018-06-18 22:40:32 +02:00
ht.c ieee80211: bump IEEE80211_MAX_AMPDU_BUF to support HE 2018-06-18 22:39:39 +02:00
ibss.c mac80211: add ability to parse CCFS2 2018-09-05 10:03:14 +02:00
ieee80211_i.h mac80211: Extend SAE authentication in infra BSS STA mode 2018-10-11 16:01:08 +02:00
iface.c mac80211: allocate TXQs for active monitor interfaces 2018-09-26 11:16:54 +02:00
Kconfig mac80211: rewrite Kconfig text for mesh 2018-12-05 15:32:28 +01:00
key.c mac80211: remove unnecessary NULL check 2018-09-05 10:15:48 +02:00
key.h mac80211: aes-cmac: switch to shash CMAC driver 2017-02-08 09:19:33 +01:00
led.c leds: triggers: let struct led_trigger::activate() return an error code 2018-07-05 23:21:10 +02:00
led.h mac80211: make LED triggering depend on activation 2015-05-05 14:21:56 +02:00
main.c mac80211: minstrel: merge with minstrel_ht, always enable VHT support 2018-10-11 16:01:01 +02:00
Makefile mac80211: minstrel: merge with minstrel_ht, always enable VHT support 2018-10-11 16:01:01 +02:00
mesh_hwmp.c mac80211: fix TX status reporting for ieee80211s 2018-09-10 09:14:28 +02:00
mesh_pathtbl.c rhashtable: Change rhashtable_walk_start to return void 2017-12-11 09:58:38 -05:00
mesh_plink.c {nl,mac}80211: add rssi to mesh candidates 2018-11-09 11:41:20 +01:00
mesh_ps.c networking: make skb_put & friends return void pointers 2017-06-16 11:48:39 -04:00
mesh_sync.c mac80211: Use appropriate name for functions and messages 2016-12-13 16:22:27 +01:00
mesh.c {nl,mac}80211: add rssi to mesh candidates 2018-11-09 11:41:20 +01:00
mesh.h {nl,mac}80211: add rssi to mesh candidates 2018-11-09 11:41:20 +01:00
michael.c mac80211: add get TID helper 2018-02-22 21:13:03 +01:00
michael.h mac80211: fix some missing includes 2014-04-09 14:49:43 +02:00
mlme.c mac80211: Extend SAE authentication in infra BSS STA mode 2018-10-11 16:01:08 +02:00
ocb.c mac80211: Convert timers to use timer_setup() 2017-11-20 16:55:11 +01:00
offchannel.c mac80211: support scan features for improved scan privacy 2018-06-15 13:34:40 +02:00
pm.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rate.c mac80211: Dynamically set CoDel parameters per station 2017-05-17 16:03:40 +02:00
rate.h mac80211: minstrel: merge with minstrel_ht, always enable VHT support 2018-10-11 16:01:01 +02:00
rc80211_minstrel_debugfs.c mac80211: rc80211_minstrel: remove variance / stddev calculation 2018-10-11 16:01:05 +02:00
rc80211_minstrel_ht_debugfs.c mac80211: rc80211_minstrel: remove variance / stddev calculation 2018-10-11 16:01:05 +02:00
rc80211_minstrel_ht.c mac80211: minstrel: do not sample rates 3 times slower than max_prob_rate 2018-10-11 16:01:04 +02:00
rc80211_minstrel_ht.h mac80211: minstrel: reduce minstrel_mcs_groups size 2018-10-11 16:01:02 +02:00
rc80211_minstrel.c mac80211: rc80211_minstrel: remove variance / stddev calculation 2018-10-11 16:01:05 +02:00
rc80211_minstrel.h mac80211: rc80211_minstrel: remove variance / stddev calculation 2018-10-11 16:01:05 +02:00
rx.c mac80211: avoid reflecting frames back to the client 2018-10-11 16:00:59 +02:00
scan.c mac80211: allow hardware scan to fall back to software 2018-11-09 11:37:04 +01:00
spectmgmt.c mac80211: add ability to parse CCFS2 2018-09-05 10:03:14 +02:00
sta_info.c {nl,mac}80211: report gate connectivity in station info 2018-11-09 11:38:29 +01:00
sta_info.h {nl,mac}80211: report gate connectivity in station info 2018-11-09 11:38:29 +01:00
status.c mac80211: implement ieee80211_tx_rate_update to update rate 2018-10-12 13:05:40 +02:00
tdls.c mac80211: TDLS: fix skb queue/priority assignment 2018-09-10 09:13:32 +02:00
tkip.c mac80211: move TKIP TX IVs to public part of key struct 2016-02-24 09:04:38 +01:00
tkip.h mac80211: move TKIP TX IVs to public part of key struct 2016-02-24 09:04:38 +01:00
trace_msg.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace.h mac80211: allow drivers to use peer measurement API 2018-11-09 11:20:34 +01:00
tx.c mac80211: tx: avoid variable shadowing 2018-11-09 11:17:25 +01:00
util.c mac80211: fix deauth TX when we disconnect 2018-12-05 15:34:59 +01:00
vht.c mac80211: copy VHT EXT NSS BW Support/Capable data to station 2018-09-05 10:03:14 +02:00
wep.c mac80211: Add RX flag to indicate ICV stripped 2017-01-12 10:15:18 +01:00
wep.h mac80211: move RX WEP weak IV counting 2012-03-13 14:54:16 -04:00
wme.c mac80211: mark expected switch fall-throughs 2017-12-11 12:16:04 +01:00
wme.h mac80211: add WMM admission control support 2014-10-22 10:42:09 +02:00
wpa.c mac80211: add get TID helper 2018-02-22 21:13:03 +01:00
wpa.h mac80111: Add BIP-GMAC-128 and BIP-GMAC-256 ciphers 2015-01-27 11:10:13 +01:00