wifi: mac80211: stop warning after reconfig failures

If we have a reconfig failure in the driver, then we need
to shut down the network interface(s) at the network stack
level through cfg80211, which can result in a lot of those
"Failed check-sdata-in-driver check, ..." warnings, since
interfaces are considered to not be in the driver when the
reconfiguration fails, but we still need to go through all
the shutdown flow.

Avoid many of these warnings by storing the fact that the
stack experienced a reconfiguration failure and not doing
the warning in that case.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230604120651.3750c4ae6e76.I9e80d6026f59263c008a1a68f6cd6891ca0b93b0@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/driver-ops.h

@@ -2,7 +2,7 @@
 /*
 * Portions of this file
 * Copyright(c) 2016 Intel Deutschland GmbH
-* Copyright (C) 2018 - 2019, 2021 Intel Corporation
+* Copyright (C) 2018 - 2019, 2021 - 2023 Intel Corporation
 */
 
 #ifndef __MAC80211_DRIVER_OPS
@@ -13,9 +13,11 @@
 #include "trace.h"
 
 #define check_sdata_in_driver(sdata)	({					\
-	!WARN_ONCE(!(sdata->flags & IEEE80211_SDATA_IN_DRIVER),			\
-		   "%s: Failed check-sdata-in-driver check, flags: 0x%x\n",	\
-		   sdata->dev ? sdata->dev->name : sdata->name, sdata->flags);	\
+	WARN_ONCE(!sdata->local->reconfig_failure &&				\
+		  !(sdata->flags & IEEE80211_SDATA_IN_DRIVER),			\
+		  "%s: Failed check-sdata-in-driver check, flags: 0x%x\n",	\
+		  sdata->dev ? sdata->dev->name : sdata->name, sdata->flags);	\
+	!!(sdata->flags & IEEE80211_SDATA_IN_DRIVER);				\
 })
 
 static inline struct ieee80211_sub_if_data *

net/mac80211/ieee80211_i.h

@@ -1394,6 +1394,9 @@ struct ieee80211_local {
 	/* device is during a HW reconfig */
 	bool in_reconfig;
 
+	/* reconfiguration failed ... suppress some warnings etc. */
+	bool reconfig_failure;
+
 	/* wowlan is enabled -- don't reconfig on resume */
 	bool wowlan;
 

net/mac80211/iface.c

@@ -1281,6 +1281,9 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
 	}
 
 	if (local->open_count == 0) {
+		/* here we can consider everything in good order (again) */
+		local->reconfig_failure = false;
+
 		res = drv_start(local);
 		if (res)
 			goto err_del_bss;

net/mac80211/util.c

@@ -2373,6 +2373,7 @@ static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
 	local->resuming = false;
 	local->suspended = false;
 	local->in_reconfig = false;
+	local->reconfig_failure = true;
 
 	ieee80211_flush_completed_scan(local, true);