diff mbox series

[29/40] wifi: mac80211: ethtool: hold wiphy mutex

Message ID 20230828135928.ab953bd13e75.I442c12f6f47701269777ab07de3561c4ccc38ee4@changeid
State New
Headers show
Series wifi: cfg80211/mac80211: locking cleanups | expand

Commit Message

Johannes Berg Aug. 28, 2023, 11:59 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

We should hold the wiphy mutex here since we're going
to call the driver and want to remove the sta_mtx.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/mac80211/ethtool.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/mac80211/ethtool.c b/net/mac80211/ethtool.c
index a3830d925cc2..c53208321c8f 100644
--- a/net/mac80211/ethtool.c
+++ b/net/mac80211/ethtool.c
@@ -5,7 +5,7 @@ 
  * Copied from cfg.c - originally
  * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2014	Intel Corporation (Author: Johannes Berg)
- * Copyright (C) 2018, 2022 Intel Corporation
+ * Copyright (C) 2018, 2022-2023 Intel Corporation
  */
 #include <linux/types.h>
 #include <net/cfg80211.h>
@@ -102,6 +102,7 @@  static void ieee80211_get_stats(struct net_device *dev,
 	 * network device.
 	 */
 
+	wiphy_lock(local->hw.wiphy);
 	mutex_lock(&local->sta_mtx);
 
 	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
@@ -200,10 +201,13 @@  static void ieee80211_get_stats(struct net_device *dev,
 
 	mutex_unlock(&local->sta_mtx);
 
-	if (WARN_ON(i != STA_STATS_LEN))
+	if (WARN_ON(i != STA_STATS_LEN)) {
+		wiphy_unlock(local->hw.wiphy);
 		return;
+	}
 
 	drv_get_et_stats(sdata, stats, &(data[STA_STATS_LEN]));
+	wiphy_unlock(local->hw.wiphy);
 }
 
 static void ieee80211_get_strings(struct net_device *dev, u32 sset, u8 *data)