This is a note to let you know that I've just added the patch titled
mt76: mt7615: fix possible deadlock while mt7615_register_ext_phy()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mt76-mt7615-fix-possible-deadlock-while-mt7615_regis.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8c5483d964a2d8ed19b9f289739506a98637ef3f
Author: Peter Chiu <chui-hao.chiu@xxxxxxxxxxxx>
Date: Mon Nov 1 10:01:13 2021 +0800
mt76: mt7615: fix possible deadlock while mt7615_register_ext_phy()
[ Upstream commit 8c55516de3f9b76b9d9444e7890682ec2efc809f ]
ieee80211_register_hw() is called with rtnl_lock held, and this could be
caused lockdep from a work item that's on a workqueue that is flushed
with the rtnl held.
Move mt7615_register_ext_phy() outside the init_work().
Signed-off-by: Peter Chiu <chui-hao.chiu@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c b/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c
index a2465b49ecd0c..87b4aa52ee0f9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c
@@ -28,8 +28,6 @@ static void mt7615_pci_init_work(struct work_struct *work)
return;
mt7615_init_work(dev);
- if (dev->dbdc_support)
- mt7615_register_ext_phy(dev);
}
static int mt7615_init_hardware(struct mt7615_dev *dev)
@@ -160,6 +158,12 @@ int mt7615_register_device(struct mt7615_dev *dev)
mt7615_init_txpower(dev, &dev->mphy.sband_2g.sband);
mt7615_init_txpower(dev, &dev->mphy.sband_5g.sband);
+ if (dev->dbdc_support) {
+ ret = mt7615_register_ext_phy(dev);
+ if (ret)
+ return ret;
+ }
+
return mt7615_init_debugfs(dev);
}
