From 35c572818ca2a1d9bd3a76eab6366b9a299f0a0b Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Date: Wed, 12 Dec 2018 22:51:53 +0100
Subject: [PATCH] mt76: dfs: run mt76x02_dfs_set_domain atomically
Grab mt76_dev mutex in mt76x02_dfs_set_domain since it runs
concurrently with mt76x{0,2}_set_channel routines
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
drivers/net/wireless/mediatek/mt76/mt76x02_dfs.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_dfs.c b/drivers/net/wireless/mediatek/mt76/mt76x02_dfs.c
index 054609c634a2..5bd523b091b6 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_dfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_dfs.c
@@ -881,12 +881,14 @@ mt76x02_dfs_set_domain(struct mt76x02_dev *dev,
{
struct mt76x02_dfs_pattern_detector *dfs_pd = &dev->dfs_pd;
+ mutex_lock(&dev->mt76.mutex);
if (dfs_pd->region != region) {
tasklet_disable(&dfs_pd->dfs_tasklet);
dfs_pd->region = region;
mt76x02_dfs_init_params(dev);
tasklet_enable(&dfs_pd->dfs_tasklet);
}
+ mutex_unlock(&dev->mt76.mutex);
}
void mt76x02_regd_notifier(struct wiphy *wiphy,