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wifi: mac80211: move sched-scan stop work to wiphy work

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[ Upstream commit eadfb54756 ]

This also has the wiphy locked here then. We need to use
the _locked version of cfg80211_sched_scan_stopped() now,
which also fixes an old deadlock there.

Fixes: a05829a722 ("cfg80211: avoid holding the RTNL when calling the driver")
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johannes Berg 2023-08-28 13:59:45 +02:00 committed by Greg Kroah-Hartman
parent 56dd205f54
commit e114cad74b
3 changed files with 10 additions and 8 deletions
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5
net/mac80211/ieee80211_i.h
View File

@ -1483,7 +1483,7 @@ struct ieee80211_local {
int hw_scan_ies_bufsize;
struct cfg80211_scan_info scan_info;
struct work_struct sched_scan_stopped_work;
struct wiphy_work sched_scan_stopped_work;
struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
struct cfg80211_sched_scan_request __rcu *sched_scan_req;
u8 scan_addr[ETH_ALEN];
@ -1962,7 +1962,8 @@ int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
struct cfg80211_sched_scan_request *req);
int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
void ieee80211_sched_scan_end(struct ieee80211_local *local);
void ieee80211_sched_scan_stopped_work(struct work_struct *work);
void ieee80211_sched_scan_stopped_work(struct wiphy *wiphy,
struct wiphy_work *work);
/* off-channel/mgmt-tx */
void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);

6
net/mac80211/main.c
View File

@ -822,8 +822,8 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
ieee80211_dynamic_ps_disable_work);
timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
INIT_WORK(&local->sched_scan_stopped_work,
ieee80211_sched_scan_stopped_work);
wiphy_work_init(&local->sched_scan_stopped_work,
ieee80211_sched_scan_stopped_work);
spin_lock_init(&local->ack_status_lock);
idr_init(&local->ack_status_frames);
@ -1481,13 +1481,13 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw)
wiphy_lock(local->hw.wiphy);
wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
wiphy_unlock(local->hw.wiphy);
rtnl_unlock();
cancel_work_sync(&local->restart_work);
cancel_work_sync(&local->reconfig_filter);
flush_work(&local->sched_scan_stopped_work);
ieee80211_clear_tx_pending(local);
rate_control_deinitialize(local);

7
net/mac80211/scan.c
View File

@ -1422,10 +1422,11 @@ void ieee80211_sched_scan_end(struct ieee80211_local *local)
mutex_unlock(&local->mtx);
cfg80211_sched_scan_stopped(local->hw.wiphy, 0);
cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
}
void ieee80211_sched_scan_stopped_work(struct work_struct *work)
void ieee80211_sched_scan_stopped_work(struct wiphy *wiphy,
struct wiphy_work *work)
{
struct ieee80211_local *local =
container_of(work, struct ieee80211_local,
@ -1448,6 +1449,6 @@ void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw)
if (local->in_reconfig)
return;
schedule_work(&local->sched_scan_stopped_work);
wiphy_work_queue(hw->wiphy, &local->sched_scan_stopped_work);
}
EXPORT_SYMBOL(ieee80211_sched_scan_stopped);