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wifi: cfg80211: add flush functions for wiphy work

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There may be sometimes reasons to actually run the work
if it's pending, add flush functions for both regular and
delayed wiphy work that will do this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2023-08-28 13:59:33 +02:00
parent 7483a2147a
commit 56cfb8ce1f
4 changed files with 57 additions and 5 deletions
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21
include/net/cfg80211.h
View file

@ -5826,6 +5826,16 @@ void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work);
*/
void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work);
/**
* wiphy_work_flush - flush previously queued work
* @wiphy: the wiphy, for debug purposes
* @work: the work to flush, this can be %NULL to flush all work
*
* Flush the work (i.e. run it if pending). This must be called
* under the wiphy mutex acquired by wiphy_lock().
*/
void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work);
struct wiphy_delayed_work {
struct wiphy_work work;
struct wiphy *wiphy;
@ -5869,6 +5879,17 @@ void wiphy_delayed_work_queue(struct wiphy *wiphy,
void wiphy_delayed_work_cancel(struct wiphy *wiphy,
struct wiphy_delayed_work *dwork);
/**
* wiphy_delayed work_flush - flush previously queued delayed work
* @wiphy: the wiphy, for debug purposes
* @work: the work to flush
*
* Flush the work (i.e. run it if pending). This must be called
* under the wiphy mutex acquired by wiphy_lock().
*/
void wiphy_delayed_work_flush(struct wiphy *wiphy,
struct wiphy_delayed_work *dwork);
/**
* struct wireless_dev - wireless device state
*

34
net/wireless/core.c
View file

@ -1049,7 +1049,8 @@ void wiphy_rfkill_start_polling(struct wiphy *wiphy)
}
EXPORT_SYMBOL(wiphy_rfkill_start_polling);
void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev)
void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev,
struct wiphy_work *end)
{
unsigned int runaway_limit = 100;
unsigned long flags;
@ -1068,6 +1069,10 @@ void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev)
wk->func(&rdev->wiphy, wk);
spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
if (wk == end)
break;
if (WARN_ON(--runaway_limit == 0))
INIT_LIST_HEAD(&rdev->wiphy_work_list);
}
@ -1118,7 +1123,7 @@ void wiphy_unregister(struct wiphy *wiphy)
#endif
/* surely nothing is reachable now, clean up work */
cfg80211_process_wiphy_works(rdev);
cfg80211_process_wiphy_works(rdev, NULL);
wiphy_unlock(&rdev->wiphy);
rtnl_unlock();
@ -1640,6 +1645,21 @@ void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work)
}
EXPORT_SYMBOL_GPL(wiphy_work_cancel);
void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
unsigned long flags;
bool run;
spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
run = !work || !list_empty(&work->entry);
spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
if (run)
cfg80211_process_wiphy_works(rdev, work);
}
EXPORT_SYMBOL_GPL(wiphy_work_flush);
void wiphy_delayed_work_timer(struct timer_list *t)
{
struct wiphy_delayed_work *dwork = from_timer(dwork, t, timer);
@ -1672,6 +1692,16 @@ void wiphy_delayed_work_cancel(struct wiphy *wiphy,
}
EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel);
void wiphy_delayed_work_flush(struct wiphy *wiphy,
struct wiphy_delayed_work *dwork)
{
lockdep_assert_held(&wiphy->mtx);
del_timer_sync(&dwork->timer);
wiphy_work_flush(wiphy, &dwork->work);
}
EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush);
static int __init cfg80211_init(void)
{
int err;

3
net/wireless/core.h
View file

@ -469,7 +469,8 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
struct net_device *dev, enum nl80211_iftype ntype,
struct vif_params *params);
void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev);
void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev,
struct wiphy_work *end);
void cfg80211_process_wdev_events(struct wireless_dev *wdev);
bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,

4
net/wireless/sysfs.c
View file

@ -105,14 +105,14 @@ static int wiphy_suspend(struct device *dev)
cfg80211_leave_all(rdev);
cfg80211_process_rdev_events(rdev);
}
cfg80211_process_wiphy_works(rdev);
cfg80211_process_wiphy_works(rdev, NULL);
if (rdev->ops->suspend)
ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
if (ret == 1) {
/* Driver refuse to configure wowlan */
cfg80211_leave_all(rdev);
cfg80211_process_rdev_events(rdev);
cfg80211_process_wiphy_works(rdev);
cfg80211_process_wiphy_works(rdev, NULL);
ret = rdev_suspend(rdev, NULL);
}
if (ret == 0)