staging: wfx: drop calls to BUG_ON()

Most of calls to BUG_ON() could replaced by WARN().

By the way, this patch also try to favor WARN() (that include a comment
about the problem) instead of WARN_ON().

Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191008094232.10014-7-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/bh.c

@@ -56,7 +56,7 @@ static int rx_helper(struct wfx_dev *wdev, size_t read_len, int *is_cnf)
 	int release_count;
 	int piggyback = 0;
 
-	WARN_ON(read_len < 4);
+	WARN(read_len < 4, "corrupted read");
 	WARN(read_len > round_down(0xFFF, 2) * sizeof(u16),
 	     "%s: request exceed WFx capability", __func__);
 
@@ -173,7 +173,7 @@ static void tx_helper(struct wfx_dev *wdev, struct hif_msg *hif)
 	bool is_encrypted = false;
 	size_t len = le16_to_cpu(hif->len);
 
-	BUG_ON(len < sizeof(*hif));
+	WARN(len < sizeof(*hif), "try to send corrupted data");
 
 	hif->seqnum = wdev->hif.tx_seqnum;
 	wdev->hif.tx_seqnum = (wdev->hif.tx_seqnum + 1) % (HIF_COUNTER_MAX + 1);

drivers/staging/wfx/bus_sdio.c

@@ -37,7 +37,7 @@ static int wfx_sdio_copy_from_io(void *priv, unsigned int reg_id,
 	unsigned int sdio_addr = reg_id << 2;
 	int ret;
 
-	BUG_ON(reg_id > 7);
+	WARN(reg_id > 7, "chip only has 7 registers");
 	WARN(((uintptr_t) dst) & 3, "unaligned buffer size");
 	WARN(count & 3, "unaligned buffer address");
 
@@ -58,7 +58,7 @@ static int wfx_sdio_copy_to_io(void *priv, unsigned int reg_id,
 	unsigned int sdio_addr = reg_id << 2;
 	int ret;
 
-	BUG_ON(reg_id > 7);
+	WARN(reg_id > 7, "chip only has 7 registers");
 	WARN(((uintptr_t) src) & 3, "unaligned buffer size");
 	WARN(count & 3, "unaligned buffer address");
 

drivers/staging/wfx/data_tx.c

@@ -44,7 +44,7 @@ static void tx_policy_build(struct wfx_vif *wvif, struct tx_policy *policy,
 	size_t count;
 	struct wfx_dev *wdev = wvif->wdev;
 
-	BUG_ON(rates[0].idx < 0);
+	WARN(rates[0].idx < 0, "invalid rate policy");
 	memset(policy, 0, sizeof(*policy));
 	for (i = 1; i < IEEE80211_TX_MAX_RATES; i++)
 		if (rates[i].idx < 0)
@@ -162,7 +162,7 @@ static int tx_policy_get(struct wfx_vif *wvif, struct ieee80211_tx_rate *rates,
 	tx_policy_build(wvif, &wanted, rates);
 
 	spin_lock_bh(&cache->lock);
-	if (WARN_ON_ONCE(list_empty(&cache->free))) {
+	if (WARN_ON(list_empty(&cache->free))) {
 		spin_unlock_bh(&cache->lock);
 		return WFX_INVALID_RATE_ID;
 	}

drivers/staging/wfx/hif_tx_mib.h

@@ -138,7 +138,7 @@ static inline int hif_set_mfp(struct wfx_vif *wvif, bool capable, bool required)
 {
 	struct hif_mib_protected_mgmt_policy val = { };
 
-	WARN_ON(required && !capable);
+	WARN(required && !capable, "incoherent arguments");
 	if (capable) {
 		val.pmf_enable = 1;
 		val.host_enc_auth_frames = 1;

drivers/staging/wfx/key.c

@@ -26,7 +26,7 @@ static int wfx_alloc_key(struct wfx_dev *wdev)
 
 static void wfx_free_key(struct wfx_dev *wdev, int idx)
 {
-	BUG_ON(!(wdev->key_map & BIT(idx)));
+	WARN(!(wdev->key_map & BIT(idx)), "inconsistent key allocation");
 	memset(&wdev->keys[idx], 0, sizeof(wdev->keys[idx]));
 	wdev->key_map &= ~BIT(idx);
 }
@@ -34,7 +34,7 @@ static void wfx_free_key(struct wfx_dev *wdev, int idx)
 static uint8_t fill_wep_pair(struct hif_wep_pairwise_key *msg,
 			     struct ieee80211_key_conf *key, u8 *peer_addr)
 {
-	WARN_ON(key->keylen > sizeof(msg->key_data));
+	WARN(key->keylen > sizeof(msg->key_data), "inconsistent data");
 	msg->key_length = key->keylen;
 	memcpy(msg->key_data, key->key, key->keylen);
 	ether_addr_copy(msg->peer_address, peer_addr);
@@ -44,7 +44,7 @@ static uint8_t fill_wep_pair(struct hif_wep_pairwise_key *msg,
 static uint8_t fill_wep_group(struct hif_wep_group_key *msg,
 			      struct ieee80211_key_conf *key)
 {
-	WARN_ON(key->keylen > sizeof(msg->key_data));
+	WARN(key->keylen > sizeof(msg->key_data), "inconsistent data");
 	msg->key_id = key->keyidx;
 	msg->key_length = key->keylen;
 	memcpy(msg->key_data, key->key, key->keylen);
@@ -56,9 +56,9 @@ static uint8_t fill_tkip_pair(struct hif_tkip_pairwise_key *msg,
 {
 	uint8_t *keybuf = key->key;
 
-	WARN_ON(key->keylen != sizeof(msg->tkip_key_data)
-			       + sizeof(msg->tx_mic_key)
-			       + sizeof(msg->rx_mic_key));
+	WARN(key->keylen != sizeof(msg->tkip_key_data)
+			    + sizeof(msg->tx_mic_key)
+			    + sizeof(msg->rx_mic_key), "inconsistent data");
 	memcpy(msg->tkip_key_data, keybuf, sizeof(msg->tkip_key_data));
 	keybuf += sizeof(msg->tkip_key_data);
 	memcpy(msg->tx_mic_key, keybuf, sizeof(msg->tx_mic_key));
@@ -75,8 +75,8 @@ static uint8_t fill_tkip_group(struct hif_tkip_group_key *msg,
 {
 	uint8_t *keybuf = key->key;
 
-	WARN_ON(key->keylen != sizeof(msg->tkip_key_data)
-			       + 2 * sizeof(msg->rx_mic_key));
+	WARN(key->keylen != sizeof(msg->tkip_key_data)
+			    + 2 * sizeof(msg->rx_mic_key), "inconsistent data");
 	msg->key_id = key->keyidx;
 	memcpy(msg->rx_sequence_counter, &seq->tkip.iv16, sizeof(seq->tkip.iv16));
 	memcpy(msg->rx_sequence_counter + sizeof(uint16_t), &seq->tkip.iv32, sizeof(seq->tkip.iv32));
@@ -94,7 +94,7 @@ static uint8_t fill_tkip_group(struct hif_tkip_group_key *msg,
 static uint8_t fill_ccmp_pair(struct hif_aes_pairwise_key *msg,
 			      struct ieee80211_key_conf *key, u8 *peer_addr)
 {
-	WARN_ON(key->keylen != sizeof(msg->aes_key_data));
+	WARN(key->keylen != sizeof(msg->aes_key_data), "inconsistent data");
 	ether_addr_copy(msg->peer_address, peer_addr);
 	memcpy(msg->aes_key_data, key->key, key->keylen);
 	return HIF_KEY_TYPE_AES_PAIRWISE;
@@ -104,7 +104,7 @@ static uint8_t fill_ccmp_group(struct hif_aes_group_key *msg,
 			       struct ieee80211_key_conf *key,
 			       struct ieee80211_key_seq *seq)
 {
-	WARN_ON(key->keylen != sizeof(msg->aes_key_data));
+	WARN(key->keylen != sizeof(msg->aes_key_data), "inconsistent data");
 	memcpy(msg->aes_key_data, key->key, key->keylen);
 	memcpy(msg->rx_sequence_counter, seq->ccmp.pn, sizeof(seq->ccmp.pn));
 	memreverse(msg->rx_sequence_counter, sizeof(seq->ccmp.pn));
@@ -117,8 +117,8 @@ static uint8_t fill_sms4_pair(struct hif_wapi_pairwise_key *msg,
 {
 	uint8_t *keybuf = key->key;
 
-	WARN_ON(key->keylen != sizeof(msg->wapi_key_data)
-			       + sizeof(msg->mic_key_data));
+	WARN(key->keylen != sizeof(msg->wapi_key_data)
+			    + sizeof(msg->mic_key_data), "inconsistent data");
 	ether_addr_copy(msg->peer_address, peer_addr);
 	memcpy(msg->wapi_key_data, keybuf, sizeof(msg->wapi_key_data));
 	keybuf += sizeof(msg->wapi_key_data);
@@ -132,8 +132,8 @@ static uint8_t fill_sms4_group(struct hif_wapi_group_key *msg,
 {
 	uint8_t *keybuf = key->key;
 
-	WARN_ON(key->keylen != sizeof(msg->wapi_key_data)
-			       + sizeof(msg->mic_key_data));
+	WARN(key->keylen != sizeof(msg->wapi_key_data)
+			    + sizeof(msg->mic_key_data), "inconsistent data");
 	memcpy(msg->wapi_key_data, keybuf, sizeof(msg->wapi_key_data));
 	keybuf += sizeof(msg->wapi_key_data);
 	memcpy(msg->mic_key_data, keybuf, sizeof(msg->mic_key_data));
@@ -145,7 +145,7 @@ static uint8_t fill_aes_cmac_group(struct hif_igtk_group_key *msg,
 				   struct ieee80211_key_conf *key,
 				   struct ieee80211_key_seq *seq)
 {
-	WARN_ON(key->keylen != sizeof(msg->igtk_key_data));
+	WARN(key->keylen != sizeof(msg->igtk_key_data), "inconsistent data");
 	memcpy(msg->igtk_key_data, key->key, key->keylen);
 	memcpy(msg->ipn, seq->aes_cmac.pn, sizeof(seq->aes_cmac.pn));
 	memreverse(msg->ipn, sizeof(seq->aes_cmac.pn));
@@ -163,7 +163,7 @@ static int wfx_add_key(struct wfx_vif *wvif, struct ieee80211_sta *sta,
 	int idx = wfx_alloc_key(wvif->wdev);
 	bool pairwise = key->flags & IEEE80211_KEY_FLAG_PAIRWISE;
 
-	WARN_ON(key->flags & IEEE80211_KEY_FLAG_PAIRWISE && !sta);
+	WARN(key->flags & IEEE80211_KEY_FLAG_PAIRWISE && !sta, "inconsistent data");
 	ieee80211_get_key_rx_seq(key, 0, &seq);
 	if (idx < 0)
 		return -EINVAL;

drivers/staging/wfx/queue.c

@@ -78,7 +78,7 @@ void wfx_tx_queues_unlock(struct wfx_dev *wdev)
 	for (i = 0; i < IEEE80211_NUM_ACS; ++i) {
 		queue = &wdev->tx_queue[i];
 		spin_lock_bh(&queue->queue.lock);
-		BUG_ON(!queue->tx_locked_cnt);
+		WARN(!queue->tx_locked_cnt, "queue already unlocked");
 		if (--queue->tx_locked_cnt == 0)
 			ieee80211_wake_queue(wdev->hw, queue->queue_id);
 		spin_unlock_bh(&queue->queue.lock);
@@ -295,8 +295,8 @@ struct sk_buff *wfx_pending_get(struct wfx_dev *wdev, u32 packet_id)
 			return skb;
 		}
 	}
-	WARN_ON(1);
 	spin_unlock_bh(&stats->pending.lock);
+	WARN(1, "cannot find packet in pending queue");
 	return NULL;
 }
 
@@ -408,7 +408,7 @@ static bool hif_handle_tx_data(struct wfx_vif *wvif, struct sk_buff *skb,
 
 	switch (action) {
 	case do_drop:
-		BUG_ON(wfx_pending_remove(wvif->wdev, skb));
+		wfx_pending_remove(wvif->wdev, skb);
 		handled = true;
 		break;
 	case do_wep:

drivers/staging/wfx/scan.c

@@ -107,7 +107,7 @@ int wfx_hw_scan(struct ieee80211_hw *hw,
 
 	wfx_tx_lock_flush(wdev);
 
-	BUG_ON(wvif->scan.req);
+	WARN(wvif->scan.req, "unexpected concurrent scan");
 	wvif->scan.req = req;
 	wvif->scan.n_ssids = 0;
 	wvif->scan.status = 0;

drivers/staging/wfx/sta.c

@@ -1454,6 +1454,7 @@ int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 		},
 	};
 
+	BUILD_BUG_ON(ARRAY_SIZE(default_edca_params) != ARRAY_SIZE(wvif->edca.params));
 	if (wfx_api_older_than(wdev, 2, 0)) {
 		default_edca_params[IEEE80211_AC_BE].queue_id = HIF_QUEUE_ID_BACKGROUND;
 		default_edca_params[IEEE80211_AC_BK].queue_id = HIF_QUEUE_ID_BESTEFFORT;
@@ -1526,7 +1527,6 @@ int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 	mutex_unlock(&wdev->conf_mutex);
 
 	hif_set_macaddr(wvif, vif->addr);
-	BUG_ON(ARRAY_SIZE(default_edca_params) != ARRAY_SIZE(wvif->edca.params));
 	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 		memcpy(&wvif->edca.params[i], &default_edca_params[i], sizeof(default_edca_params[i]));
 		wvif->edca.uapsd_enable[i] = false;