mac80211: Set CAN_REPLACE_PTK0 for SW crypto only drivers

Mac80211 SW crypto handles replacing PTK keys correctly.

Don't trigger needless warnings or workarounds when the driver can only
use the known good SW crypto provided by mac80211.

Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index e56650a9838e82cd266628853777cdd972a67677..2b608044ae23be931715e02c7119d41407f24e52 100644 (file)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1060,6 +1060,13 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                wiphy_ext_feature_set(local->hw.wiphy,
                                      NL80211_EXT_FEATURE_EXT_KEY_ID);
 
+       /* Mac80211 and therefore all cards only using SW crypto are able to
+        * handle PTK rekeys correctly
+        */
+       if (!local->ops->set_key)
+               wiphy_ext_feature_set(local->hw.wiphy,
+                                     NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
+
        /*
         * Calculate scan IE length -- we need this to alloc
         * memory and to subtract from the driver limit. It