mt76: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-throughSigned-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7603/dma.c

@@ -121,7 +121,7 @@ void mt7603_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 			mt76_rx(&dev->mt76, q, skb);
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		dev_kfree_skb(skb);
 		break;

drivers/net/wireless/mediatek/mt76/mt7603/mac.c

@@ -592,7 +592,7 @@ mt7603_mac_fill_rx(struct mt7603_dev *dev, struct sk_buff *skb)
 		switch (FIELD_GET(MT_RXV1_TX_MODE, rxdg0)) {
 		case MT_PHY_TYPE_CCK:
 			cck = true;
-			/* fall through */
+			fallthrough;
 		case MT_PHY_TYPE_OFDM:
 			i = mt76_get_rate(&dev->mt76, sband, i, cck);
 			break;
@@ -1163,7 +1163,7 @@ mt7603_fill_txs(struct mt7603_dev *dev, struct mt7603_sta *sta,
 	switch (FIELD_GET(MT_TX_RATE_MODE, final_rate)) {
 	case MT_PHY_TYPE_CCK:
 		cck = true;
-		/* fall through */
+		fallthrough;
 	case MT_PHY_TYPE_OFDM:
 		if (dev->mphy.chandef.chan->band == NL80211_BAND_5GHZ)
 			sband = &dev->mphy.sband_5g.sband;

drivers/net/wireless/mediatek/mt76/mt7615/mac.c

@@ -378,7 +378,7 @@ static int mt7615_mac_fill_rx(struct mt7615_dev *dev, struct sk_buff *skb)
 		switch (FIELD_GET(MT_RXV1_TX_MODE, rxdg0)) {
 		case MT_PHY_TYPE_CCK:
 			cck = true;
-			/* fall through */
+			fallthrough;
 		case MT_PHY_TYPE_OFDM:
 			i = mt76_get_rate(&dev->mt76, sband, i, cck);
 			break;
@@ -1271,7 +1271,7 @@ static bool mt7615_fill_txs(struct mt7615_dev *dev, struct mt7615_sta *sta,
 	switch (FIELD_GET(MT_TX_RATE_MODE, final_rate)) {
 	case MT_PHY_TYPE_CCK:
 		cck = true;
-		/* fall through */
+		fallthrough;
 	case MT_PHY_TYPE_OFDM:
 		mphy = &dev->mphy;
 		if (sta->wcid.ext_phy && dev->mt76.phy2)
@@ -1497,7 +1497,7 @@ void mt7615_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 			mt76_rx(&dev->mt76, q, skb);
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		dev_kfree_skb(skb);
 		break;

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -3292,7 +3292,7 @@ static int mt7615_dcoc_freq_idx(u16 freq, u8 bw)
 			freq = freq_bw40[idx];
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case NL80211_CHAN_WIDTH_40:
 		idx = mt7615_find_freq_idx(freq_bw40, ARRAY_SIZE(freq_bw40),
 					   freq);

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

@@ -734,7 +734,7 @@ mt76x0_phy_get_delta_power(struct mt76x02_dev *dev, u8 tx_mode,
 	case 1:
 		if (chan->band == NL80211_BAND_2GHZ)
 			tssi_target += 29491; /* 3.6 * 8192 */
-		/* fall through */
+		fallthrough;
 	case 0:
 		break;
 	default:

drivers/net/wireless/mediatek/mt76/mt76x02_mac.c

@@ -300,7 +300,7 @@ mt76x02_mac_process_tx_rate(struct ieee80211_tx_rate *txrate, u16 rate,
 		return 0;
 	case MT_PHY_TYPE_HT_GF:
 		txrate->flags |= IEEE80211_TX_RC_GREEN_FIELD;
-		/* fall through */
+		fallthrough;
 	case MT_PHY_TYPE_HT:
 		txrate->flags |= IEEE80211_TX_RC_MCS;
 		txrate->idx = idx;
@@ -464,7 +464,7 @@ mt76x02_tx_rate_fallback(struct ieee80211_tx_rate *rates, int idx, int phy)
 			rates[1].idx = 0;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		rates[1].idx = max_t(int, rates[0].idx - 1, 0);
 		break;
@@ -679,7 +679,7 @@ mt76x02_mac_process_rate(struct mt76x02_dev *dev,
 		return 0;
 	case MT_PHY_TYPE_HT_GF:
 		status->enc_flags |= RX_ENC_FLAG_HT_GF;
-		/* fall through */
+		fallthrough;
 	case MT_PHY_TYPE_HT:
 		status->encoding = RX_ENC_HT;
 		status->rate_idx = idx;

drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c

@@ -21,7 +21,6 @@ static int mt7915_ser_trigger_set(void *data, u64 val)
 	switch (val) {
 	case SER_SET_RECOVER_L1:
 	case SER_SET_RECOVER_L2:
-		/* fall through */
 		ret = mt7915_mcu_set_ser(dev, SER_ENABLE, BIT(val), 0);
 		if (ret)
 			return ret;

drivers/net/wireless/mediatek/mt76/mt7915/dma.c

@@ -66,7 +66,7 @@ void mt7915_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 			mt76_rx(&dev->mt76, q, skb);
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		dev_kfree_skb(skb);
 		break;

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -471,7 +471,7 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
 			switch (mode) {
 			case MT_PHY_TYPE_CCK:
 				cck = true;
-				/* fall through */
+				fallthrough;
 			case MT_PHY_TYPE_OFDM:
 				i = mt76_get_rate(&dev->mt76, sband, i, cck);
 				break;
@@ -490,7 +490,7 @@ int mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
 				break;
 			case MT_PHY_TYPE_HE_MU:
 				status->flag |= RX_FLAG_RADIOTAP_HE_MU;
-				/* fall through */
+				fallthrough;
 			case MT_PHY_TYPE_HE_SU:
 			case MT_PHY_TYPE_HE_EXT_SU:
 			case MT_PHY_TYPE_HE_TB:

drivers/net/wireless/mediatek/mt76/mt7915/mcu.c

@@ -1431,7 +1431,7 @@ mt7915_mcu_sta_he_tlv(struct sk_buff *skb, struct ieee80211_sta *sta)
 
 		he->max_nss_mcs[CMD_HE_MCS_BW160] =
 				he_cap->he_mcs_nss_supp.rx_mcs_160;
-		/* fall through */
+		fallthrough;
 	default:
 		he->max_nss_mcs[CMD_HE_MCS_BW80] =
 				he_cap->he_mcs_nss_supp.rx_mcs_80;

drivers/net/wireless/mediatek/mt76/usb.c

@@ -616,7 +616,7 @@ static void mt76u_complete_rx(struct urb *urb)
 	default:
 		dev_err_ratelimited(dev->dev, "rx urb failed: %d\n",
 				    urb->status);
-		/* fall through */
+		fallthrough;
 	case 0:
 		break;
 	}