mt76: mt7921: avoid unnecessary consecutive WiFi resets

Avoid unnecessary consecutive WiFi resets by dropping reset
request when reset work is working.
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7921/mac.c

@@ -1312,6 +1312,7 @@ void mt7921_mac_reset_work(struct work_struct *work)
 	int i;
 
 	dev_err(dev->mt76.dev, "chip reset\n");
+	dev->hw_full_reset = true;
 	ieee80211_stop_queues(hw);
 
 	cancel_delayed_work_sync(&dev->mphy.mac_work);
@@ -1338,6 +1339,7 @@ void mt7921_mac_reset_work(struct work_struct *work)
 		ieee80211_scan_completed(dev->mphy.hw, &info);
 	}
 
+	dev->hw_full_reset = false;
 	ieee80211_wake_queues(hw);
 	ieee80211_iterate_active_interfaces(hw,
 					    IEEE80211_IFACE_ITER_RESUME_ALL,
@@ -1349,6 +1351,7 @@ void mt7921_reset(struct mt76_dev *mdev)
 {
 	struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
 
+	if (!dev->hw_full_reset)
 		queue_work(dev->mt76.wq, &dev->reset_work);
 }
 

drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h

@@ -156,6 +156,7 @@ struct mt7921_dev {
 	u16 chainmask;
 
 	struct work_struct reset_work;
+	bool hw_full_reset;
 
 	struct list_head sta_poll_list;
 	spinlock_t sta_poll_lock;