From 2fd0511556538a2d713e7a3d032c51cfe0117642 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 29 Apr 2014 17:52:36 +0200 Subject: cfg80211: remove BUG_ON usage These really can't trigger unless somebody messes up the code, but don't make debugging it needlessly complicated, WARN and return instead of BUG_ON(). Signed-off-by: Johannes Berg --- net/wireless/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/wireless/core.c') diff --git a/net/wireless/core.c b/net/wireless/core.c index b3ff3697239a..f509da4d9be9 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -690,7 +690,7 @@ void wiphy_unregister(struct wiphy *wiphy) rtnl_lock(); rdev->wiphy.registered = false; - BUG_ON(!list_empty(&rdev->wdev_list)); + WARN_ON(!list_empty(&rdev->wdev_list)); /* * First remove the hardware from everywhere, this makes -- cgit v1.2.3 From f04c22033c25f71617ac62bcfe75698baa17a0b8 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Wed, 9 Apr 2014 15:11:01 +0200 Subject: cfg80211: export interface stopping function This exports a new cfg80211_stop_iface() function. This is intended for driver internal interface combination management and channel switching. Due to locking issues (it re-enters driver) the call is asynchronous and uses cfg80211 event list/worker. Signed-off-by: Michal Kazior Signed-off-by: Johannes Berg --- net/wireless/core.c | 43 ++++++++++++++++++++++++++++++++++++------- 1 file changed, 36 insertions(+), 7 deletions(-) (limited to 'net/wireless/core.c') diff --git a/net/wireless/core.c b/net/wireless/core.c index f509da4d9be9..7e023b74f009 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -792,23 +792,23 @@ void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, rdev->num_running_monitor_ifaces += num; } -void cfg80211_leave(struct cfg80211_registered_device *rdev, - struct wireless_dev *wdev) +void __cfg80211_leave(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev) { struct net_device *dev = wdev->netdev; ASSERT_RTNL(); + ASSERT_WDEV_LOCK(wdev); switch (wdev->iftype) { case NL80211_IFTYPE_ADHOC: - cfg80211_leave_ibss(rdev, dev, true); + __cfg80211_leave_ibss(rdev, dev, true); break; case NL80211_IFTYPE_P2P_CLIENT: case NL80211_IFTYPE_STATION: if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev) __cfg80211_stop_sched_scan(rdev, false); - wdev_lock(wdev); #ifdef CONFIG_CFG80211_WEXT kfree(wdev->wext.ie); wdev->wext.ie = NULL; @@ -817,20 +817,49 @@ void cfg80211_leave(struct cfg80211_registered_device *rdev, #endif cfg80211_disconnect(rdev, dev, WLAN_REASON_DEAUTH_LEAVING, true); - wdev_unlock(wdev); break; case NL80211_IFTYPE_MESH_POINT: - cfg80211_leave_mesh(rdev, dev); + __cfg80211_leave_mesh(rdev, dev); break; case NL80211_IFTYPE_AP: case NL80211_IFTYPE_P2P_GO: - cfg80211_stop_ap(rdev, dev, true); + __cfg80211_stop_ap(rdev, dev, true); break; default: break; } } +void cfg80211_leave(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev) +{ + wdev_lock(wdev); + __cfg80211_leave(rdev, wdev); + wdev_unlock(wdev); +} + +void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, + gfp_t gfp) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + struct cfg80211_event *ev; + unsigned long flags; + + trace_cfg80211_stop_iface(wiphy, wdev); + + ev = kzalloc(sizeof(*ev), gfp); + if (!ev) + return; + + ev->type = EVENT_STOPPED; + + spin_lock_irqsave(&wdev->event_lock, flags); + list_add_tail(&ev->list, &wdev->event_list); + spin_unlock_irqrestore(&wdev->event_lock, flags); + queue_work(cfg80211_wq, &rdev->event_work); +} +EXPORT_SYMBOL(cfg80211_stop_iface); + static int cfg80211_netdev_notifier_call(struct notifier_block *nb, unsigned long state, void *ptr) { -- cgit v1.2.3 From f6837ba8c98afcf28ec25f6863a8597274aeefd6 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 30 Apr 2014 14:19:04 +0200 Subject: mac80211: handle failed restart/resume better When the driver fails during HW restart or resume, the whole stack goes into a very confused state with interfaces being up while the hardware is down etc. Address this by shutting down everything; we'll run into a lot of warnings in the process but that's better than having the whole stack get messed up. Reviewed-by: Arik Nemtsov Signed-off-by: Johannes Berg --- net/wireless/core.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) (limited to 'net/wireless/core.c') diff --git a/net/wireless/core.c b/net/wireless/core.c index 7e023b74f009..39788711ce6e 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -210,15 +210,12 @@ void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, } } -static int cfg80211_rfkill_set_block(void *data, bool blocked) +void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) { - struct cfg80211_registered_device *rdev = data; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); struct wireless_dev *wdev; - if (!blocked) - return 0; - - rtnl_lock(); + ASSERT_RTNL(); list_for_each_entry(wdev, &rdev->wdev_list, list) { if (wdev->netdev) { @@ -234,7 +231,18 @@ static int cfg80211_rfkill_set_block(void *data, bool blocked) break; } } +} +EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); +static int cfg80211_rfkill_set_block(void *data, bool blocked) +{ + struct cfg80211_registered_device *rdev = data; + + if (!blocked) + return 0; + + rtnl_lock(); + cfg80211_shutdown_all_interfaces(&rdev->wiphy); rtnl_unlock(); return 0; -- cgit v1.2.3 From 9a774c78e2114c7e8605e3a168ccd552cbe3d922 Mon Sep 17 00:00:00 2001 From: Andrei Otcheretianski Date: Fri, 9 May 2014 14:11:46 +0300 Subject: cfg80211: Support multiple CSA counters Change the type of NL80211_ATTR_CSA_C_OFF_BEACON and NL80211_ATTR_CSA_C_OFF_PRESP to be NLA_BINARY which allows userspace to use beacons and probe responses with multiple CSA counters. This isn't breaking the API since userspace can continue to use nla_put_u16 for this attributes, which is equivalent to a single element u16 array. In addition advertise max number of supported CSA counters. This is needed when using CSA and eCSA IEs together. Signed-off-by: Andrei Otcheretianski Signed-off-by: Luciano Coelho Signed-off-by: Johannes Berg --- net/wireless/core.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/wireless/core.c') diff --git a/net/wireless/core.c b/net/wireless/core.c index 39788711ce6e..d03d8bdb29ca 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -402,6 +402,8 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) rdev->wiphy.rts_threshold = (u32) -1; rdev->wiphy.coverage_class = 0; + rdev->wiphy.max_num_csa_counters = 1; + return &rdev->wiphy; } EXPORT_SYMBOL(wiphy_new); -- cgit v1.2.3