From: Johannes Berg <[email protected]> There's no need to allocate a portid structure and then, for each of those, walk the interfaces - we can just add a flag to each interface and walk those directly. Due to padding in the struct, we can even do it without any memory cost, and it even simplifies the code.
Signed-off-by: Johannes Berg <[email protected]> --- include/net/cfg80211.h | 5 +++-- net/wireless/core.c | 26 ++++---------------------- net/wireless/core.h | 8 -------- net/wireless/nl80211.c | 22 +++++----------------- 4 files changed, 12 insertions(+), 49 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 2a200b964b7a..999ec24afbe7 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -4037,12 +4037,13 @@ struct wireless_dev { u32 ap_unexpected_nlportid; + u32 owner_nlportid; + bool nl_owner_dead; + bool cac_started; unsigned long cac_start_time; unsigned int cac_time_ms; - u32 owner_nlportid; - #ifdef CONFIG_CFG80211_WEXT /* wext data */ struct { diff --git a/net/wireless/core.c b/net/wireless/core.c index b0d6761f0cdd..4ea28de3a636 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -305,30 +305,14 @@ static void cfg80211_event_work(struct work_struct *work) void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) { - struct cfg80211_iface_destroy *item; + struct wireless_dev *wdev, *tmp; ASSERT_RTNL(); - spin_lock_irq(&rdev->destroy_list_lock); - while ((item = list_first_entry_or_null(&rdev->destroy_list, - struct cfg80211_iface_destroy, - list))) { - struct wireless_dev *wdev, *tmp; - u32 nlportid = item->nlportid; - - list_del(&item->list); - kfree(item); - spin_unlock_irq(&rdev->destroy_list_lock); - - list_for_each_entry_safe(wdev, tmp, - &rdev->wiphy.wdev_list, list) { - if (nlportid == wdev->owner_nlportid) - rdev_del_virtual_intf(rdev, wdev); - } - - spin_lock_irq(&rdev->destroy_list_lock); + list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { + if (wdev->nl_owner_dead) + rdev_del_virtual_intf(rdev, wdev); } - spin_unlock_irq(&rdev->destroy_list_lock); } static void cfg80211_destroy_iface_wk(struct work_struct *work) @@ -484,8 +468,6 @@ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, rdev->wiphy.dev.platform_data = rdev; device_enable_async_suspend(&rdev->wiphy.dev); - INIT_LIST_HEAD(&rdev->destroy_list); - spin_lock_init(&rdev->destroy_list_lock); INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); INIT_WORK(&rdev->propagate_radar_detect_wk, diff --git a/net/wireless/core.h b/net/wireless/core.h index 5d27eca57d3b..f9b748e3425a 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -91,10 +91,7 @@ struct cfg80211_registered_device { struct cfg80211_coalesce *coalesce; - spinlock_t destroy_list_lock; - struct list_head destroy_list; struct work_struct destroy_work; - struct work_struct sched_scan_stop_wk; struct cfg80211_chan_def radar_chandef; @@ -264,11 +261,6 @@ struct cfg80211_beacon_registration { u32 nlportid; }; -struct cfg80211_iface_destroy { - struct list_head list; - u32 nlportid; -}; - struct cfg80211_cqm_config { u32 rssi_hyst; s32 last_rssi_event_value; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 50c35affccad..45f5f418e562 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -14883,7 +14883,6 @@ static int nl80211_netlink_notify(struct notifier_block * nb, rcu_read_lock(); list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) { - bool schedule_destroy_work = false; struct cfg80211_sched_scan_request *sched_scan_req = rcu_dereference(rdev->sched_scan_req); @@ -14899,10 +14898,12 @@ static int nl80211_netlink_notify(struct notifier_block * nb, list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) { cfg80211_mlme_unregister_socket(wdev, notify->portid); - if (wdev->owner_nlportid == notify->portid) - schedule_destroy_work = true; - else if (wdev->conn_owner_nlportid == notify->portid) + if (wdev->owner_nlportid == notify->portid) { + wdev->nl_owner_dead = true; + schedule_work(&rdev->destroy_work); + } else if (wdev->conn_owner_nlportid == notify->portid) { schedule_work(&wdev->disconnect_wk); + } } spin_lock_bh(&rdev->beacon_registrations_lock); @@ -14915,19 +14916,6 @@ static int nl80211_netlink_notify(struct notifier_block * nb, } } spin_unlock_bh(&rdev->beacon_registrations_lock); - - if (schedule_destroy_work) { - struct cfg80211_iface_destroy *destroy; - - destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC); - if (destroy) { - destroy->nlportid = notify->portid; - spin_lock(&rdev->destroy_list_lock); - list_add(&destroy->list, &rdev->destroy_list); - spin_unlock(&rdev->destroy_list_lock); - schedule_work(&rdev->destroy_work); - } - } } rcu_read_unlock(); -- 2.11.0
