mt76x0: remove hw_atomic_mutex mutex in mt76x0_dev

Remove hw_atomic_mutex mutex in mt76x0_dev data structure
since mt76x0_phy_set_channel is already protected by mt76_dev
mutex while mt76x0_chip_onoff is used just at device probe or
cleanup
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x0/init.c

@@ -73,8 +73,6 @@ void mt76x0_chip_onoff(struct mt76x0_dev *dev, bool enable, bool reset)
 {
 	u32 val;
 
-	mutex_lock(&dev->hw_atomic_mutex);
-
 	val = mt76_rr(dev, MT_WLAN_FUN_CTRL);
 
 	if (reset) {
@@ -96,8 +94,6 @@ void mt76x0_chip_onoff(struct mt76x0_dev *dev, bool enable, bool reset)
 	udelay(20);
 
 	mt76x0_set_wlan_state(dev, val, enable);
-
-	mutex_unlock(&dev->hw_atomic_mutex);
 }
 EXPORT_SYMBOL_GPL(mt76x0_chip_onoff);
 
@@ -346,7 +342,6 @@ mt76x0_alloc_device(struct device *pdev,
 
 	dev = container_of(mdev, struct mt76x0_dev, mt76);
 	mutex_init(&dev->reg_atomic_mutex);
-	mutex_init(&dev->hw_atomic_mutex);
 	atomic_set(&dev->avg_ampdu_len, 1);
 
 	return dev;

drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h

@@ -72,8 +72,6 @@ enum mt_bw {
  * @mutex:		ensures exclusive access from mac80211 callbacks.
  * @reg_atomic_mutex:	ensures atomicity of indirect register accesses
  *			(accesses to RF and BBP).
- * @hw_atomic_mutex:	ensures exclusive access to HW during critical
- *			operations (power management, channel switch).
  */
 struct mt76x0_dev {
 	struct mt76_dev mt76; /* must be first */
@@ -84,7 +82,6 @@ struct mt76x0_dev {
 	struct mt76x0_caldata caldata;
 
 	struct mutex reg_atomic_mutex;
-	struct mutex hw_atomic_mutex;
 
 	atomic_t avg_ampdu_len;
 

drivers/net/wireless/mediatek/mt76/mt76x0/phy.c

@@ -614,9 +614,8 @@ void mt76x0_phy_set_txpower(struct mt76x0_dev *dev)
 	mt76x02_phy_set_txpower(&dev->mt76, info[0], info[1]);
 }
 
-static int
-__mt76x0_phy_set_channel(struct mt76x0_dev *dev,
-		       struct cfg80211_chan_def *chandef)
+int mt76x0_phy_set_channel(struct mt76x0_dev *dev,
+			   struct cfg80211_chan_def *chandef)
 {
 	u32 ext_cca_chan[4] = {
 		[0] = FIELD_PREP(MT_EXT_CCA_CFG_CCA0, 0) |
@@ -713,18 +712,6 @@ __mt76x0_phy_set_channel(struct mt76x0_dev *dev,
 	return 0;
 }
 
-int mt76x0_phy_set_channel(struct mt76x0_dev *dev,
-			   struct cfg80211_chan_def *chandef)
-{
-	int ret;
-
-	mutex_lock(&dev->hw_atomic_mutex);
-	ret = __mt76x0_phy_set_channel(dev, chandef);
-	mutex_unlock(&dev->hw_atomic_mutex);
-
-	return ret;
-}
-
 void mt76x0_phy_recalibrate_after_assoc(struct mt76x0_dev *dev)
 {
 	u32 tx_alc, reg_val;