mac80211: push interface checks down
This patch pushes the "netif_running()" and "same type as before"
checks down into ieee80211_if_change_type() to centralise the
logic instead of duplicating it for cfg80211 and wext.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 6cf121b..2e3adcb 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -138,9 +138,23 @@
ieee80211_debugfs_add_netdev(sdata);
}
-void ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
- enum ieee80211_if_types type)
+int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
+ enum ieee80211_if_types type)
{
+ ASSERT_RTNL();
+
+ if (type == sdata->vif.type)
+ return 0;
+
+ /*
+ * We could, here, on changes between IBSS/STA/MESH modes,
+ * invoke an MLME function instead that disassociates etc.
+ * and goes into the requested mode.
+ */
+
+ if (netif_running(sdata->dev))
+ return -EBUSY;
+
/* Purge and reset type-dependent state. */
ieee80211_teardown_sdata(sdata->dev);
ieee80211_setup_sdata(sdata, type);
@@ -149,6 +163,8 @@
sdata->basic_rates = 0;
sdata->drop_unencrypted = 0;
sdata->sequence = 0;
+
+ return 0;
}
int ieee80211_if_add(struct ieee80211_local *local, const char *name,