Merge tag 'mac80211-for-davem-2015-11-03' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Another set of fixes:
 * remove a warning on a check that can trigger without any
   errors having happened (Andrei)
 * correctly handle deauth request while in the process of
   associating (Andrei)
 * fix TDLS HT operation (Arik)
 * allow changing AID/listen interval during client setup (Ayala)
 * be more forgiving with WMM parameters to get HT/VHT in case of
   broken APs with bad WMM settings (Emmanuel, myself)
 * a number of other fixes (some in documentation)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 46 insertions, 0 deletions

diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index a1d54318f16c..ca1fe5576103 100644
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -1,4 +1,6 @@
 /*
+ * Copyright 2015 Intel Deutschland GmbH
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
@@ -8,6 +10,48 @@
 #include "trace.h"
 #include "driver-ops.h"
 
+int drv_start(struct ieee80211_local *local)
+{
+	int ret;
+
+	might_sleep();
+
+	if (WARN_ON(local->started))
+		return -EALREADY;
+
+	trace_drv_start(local);
+	local->started = true;
+	/* allow rx frames */
+	smp_mb();
+	ret = local->ops->start(&local->hw);
+	trace_drv_return_int(local, ret);
+
+	if (ret)
+		local->started = false;
+
+	return ret;
+}
+
+void drv_stop(struct ieee80211_local *local)
+{
+	might_sleep();
+
+	if (WARN_ON(!local->started))
+		return;
+
+	trace_drv_stop(local);
+	local->ops->stop(&local->hw);
+	trace_drv_return_void(local);
+
+	/* sync away all work on the tasklet before clearing started */
+	tasklet_disable(&local->tasklet);
+	tasklet_enable(&local->tasklet);
+
+	barrier();
+
+	local->started = false;
+}
+
 int drv_add_interface(struct ieee80211_local *local,
 		      struct ieee80211_sub_if_data *sdata)
 {
@@ -192,6 +236,8 @@ int drv_switch_vif_chanctx(struct ieee80211_local *local,
 	int ret = 0;
 	int i;
 
+	might_sleep();
+
 	if (!local->ops->switch_vif_chanctx)
 		return -EOPNOTSUPP;