cfg80211: disable CSA for all drivers

The channel switch announcement code has some major locking problems
which can cause a deadlock in worst case. A series of fixes has been
proposed, but these are non-trivial and need to be tested first.
Therefore disable CSA completely for 3.13.

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/wireless/core.c b/net/wireless/core.c
index 00a65ba3aeaa..52b865fb7351 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -454,6 +454,12 @@ int wiphy_register(struct wiphy *wiphy)
         /* support for 5/10 MHz is broken due to nl80211 API mess - disable */
         wiphy->flags &= ~WIPHY_FLAG_SUPPORTS_5_10_MHZ;
 
+        /*
+         * There are major locking problems in nl80211/mac80211 for CSA,
+         * disable for all drivers until this has been reworked.
+         */
+        wiphy->flags &= ~WIPHY_FLAG_HAS_CHANNEL_SWITCH;
+
 #ifdef CONFIG_PM
         if (WARN_ON(wiphy->wowlan &&
                     (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&