[PATCH 2/4] wifi: mt76: mt7921: fix potential command timeout issues when suspend

[Mingyen Hsieh]

From: Ming Yen Hsieh <mingyen.hsieh at mediatek.com>

An ongoing command may be interrupted if suspended, leading to a
command timeout. Add a lock to the suspend function in order to
protect the ongoing command from being interrupted.

Signed-off-by: Leon Yen <leon.yen at mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh at mediatek.com>
---
 drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
index 57903c6e4f11..e1c53f18abdc 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -409,7 +409,9 @@ static int mt7921_pci_suspend(struct device *device)
 	if (err < 0)
 		goto restore_suspend;
 
+	mt792x_mutex_acquire(dev);
 	err = mt76_connac_mcu_set_hif_suspend(mdev, true);
+	mt792x_mutex_release(dev);
 	if (err)
 		goto restore_suspend;
 
-- 
2.18.0