From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Fri, 3 Jul 2020 08:15:50 +0000 (+0200)
Subject: mt76: mt7615: add missing lock in mt7615_regd_notifier
X-Git-Tag: v5.9-rc1~133^2~19^2~34^2~29
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=030aaeddbab161403aa4e4f34b84971bb5db7a9f;p=linux-block.git

mt76: mt7615: add missing lock in mt7615_regd_notifier

Make sure to run mt7615_dfs_init_radar_detector in mt7615_regd_notifier
holding mt76 mutex in order to avoid races and set the device in full
power

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/init.c b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
index 5bb87dd21279..fdc40a1c84c4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
@@ -285,7 +285,9 @@ mt7615_regd_notifier(struct wiphy *wiphy,
 	if (!(chandef->chan->flags & IEEE80211_CHAN_RADAR))
 		return;
 
+	mt7615_mutex_acquire(dev);
 	mt7615_dfs_init_radar_detector(phy);
+	mt7615_mutex_release(dev);
 }
 
 static void