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 <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 14 insertions, 6 deletions

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;