iwlegacy: remove reset rf infrastructure

We do not reset radio anymore, hence don't need that code too.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlegacy/iwl-3945.c

@@ -2697,7 +2697,6 @@ static struct iwl_base_params iwl3945_base_params = {
 	.set_l0s = false,
 	.use_bsm = true,
 	.led_compensation = 64,
-	.plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
 	.wd_timeout = IWL_DEF_WD_TIMEOUT,
 	.max_event_log_size = 512,
 };

drivers/net/wireless/iwlegacy/iwl-4965-lib.c

@@ -694,47 +694,6 @@ void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
 	       sizeof(struct iwl_rx_phy_res));
 }
 
-static int iwl4965_get_single_channel_for_scan(struct iwl_priv *priv,
-					   struct ieee80211_vif *vif,
-					   enum ieee80211_band band,
-					   struct iwl_scan_channel *scan_ch)
-{
-	const struct ieee80211_supported_band *sband;
-	u16 passive_dwell = 0;
-	u16 active_dwell = 0;
-	int added = 0;
-	u16 channel = 0;
-
-	sband = iwl_get_hw_mode(priv, band);
-	if (!sband) {
-		IWL_ERR(priv, "invalid band\n");
-		return added;
-	}
-
-	active_dwell = iwl_legacy_get_active_dwell_time(priv, band, 0);
-	passive_dwell = iwl_legacy_get_passive_dwell_time(priv, band, vif);
-
-	if (passive_dwell <= active_dwell)
-		passive_dwell = active_dwell + 1;
-
-	channel = iwl_legacy_get_single_channel_number(priv, band);
-	if (channel) {
-		scan_ch->channel = cpu_to_le16(channel);
-		scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
-		scan_ch->active_dwell = cpu_to_le16(active_dwell);
-		scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
-		/* Set txpower levels to defaults */
-		scan_ch->dsp_atten = 110;
-		if (band == IEEE80211_BAND_5GHZ)
-			scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
-		else
-			scan_ch->tx_gain = ((1 << 5) | (5 << 3));
-		added++;
-	} else
-		IWL_ERR(priv, "no valid channel found\n");
-	return added;
-}
-
 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
 				     struct ieee80211_vif *vif,
 				     enum ieee80211_band band,
@@ -858,16 +817,13 @@ int iwl4965_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
 	scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
 
 	if (iwl_legacy_is_any_associated(priv)) {
-		u16 interval = 0;
+		u16 interval;
 		u32 extra;
 		u32 suspend_time = 100;
 		u32 scan_suspend_time = 100;
 
 		IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
-		if (priv->is_internal_short_scan)
-			interval = 0;
-		else
-			interval = vif->bss_conf.beacon_int;
+		interval = vif->bss_conf.beacon_int;
 
 		scan->suspend_time = 0;
 		scan->max_out_time = cpu_to_le32(200 * 1024);
@@ -882,9 +838,7 @@ int iwl4965_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
 			       scan_suspend_time, interval);
 	}
 
-	if (priv->is_internal_short_scan) {
-		IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
-	} else if (priv->scan_request->n_ssids) {
+	if (priv->scan_request->n_ssids) {
 		int i, p = 0;
 		IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
 		for (i = 0; i < priv->scan_request->n_ssids; i++) {
@@ -981,38 +935,21 @@ int iwl4965_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
 	rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
 	rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 	scan->rx_chain = cpu_to_le16(rx_chain);
-	if (!priv->is_internal_short_scan) {
-		cmd_len = iwl_legacy_fill_probe_req(priv,
+
+	cmd_len = iwl_legacy_fill_probe_req(priv,
 					(struct ieee80211_mgmt *)scan->data,
 					vif->addr,
 					priv->scan_request->ie,
 					priv->scan_request->ie_len,
 					IWL_MAX_SCAN_SIZE - sizeof(*scan));
-	} else {
-		/* use bcast addr, will not be transmitted but must be valid */
-		cmd_len = iwl_legacy_fill_probe_req(priv,
-					(struct ieee80211_mgmt *)scan->data,
-					iwlegacy_bcast_addr, NULL, 0,
-					IWL_MAX_SCAN_SIZE - sizeof(*scan));
-
-	}
 	scan->tx_cmd.len = cpu_to_le16(cmd_len);
 
 	scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
 			       RXON_FILTER_BCON_AWARE_MSK);
 
-	if (priv->is_internal_short_scan) {
-		scan->channel_count =
-			iwl4965_get_single_channel_for_scan(priv, vif, band,
-				(void *)&scan->data[le16_to_cpu(
-				scan->tx_cmd.len)]);
-	} else {
-		scan->channel_count =
-			iwl4965_get_channels_for_scan(priv, vif, band,
-				is_active, n_probes,
-				(void *)&scan->data[le16_to_cpu(
-				scan->tx_cmd.len)]);
-	}
+	scan->channel_count = iwl4965_get_channels_for_scan(priv, vif, band,
+						is_active, n_probes,
+						(void *)&scan->data[cmd_len]);
 	if (scan->channel_count == 0) {
 		IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
 		return -EIO;

drivers/net/wireless/iwlegacy/iwl-4965.c

@@ -2149,7 +2149,6 @@ static struct iwl_base_params iwl4965_base_params = {
 	.use_bsm = true,
 	.led_compensation = 61,
 	.chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
-	.plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
 	.wd_timeout = IWL_DEF_WD_TIMEOUT,
 	.temperature_kelvin = true,
 	.max_event_log_size = 512,

drivers/net/wireless/iwlegacy/iwl-core.c

@@ -1707,41 +1707,14 @@ iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
 EXPORT_SYMBOL(iwl_legacy_update_stats);
 #endif
 
-static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
-{
-	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
-		return;
-
-	if (!iwl_legacy_is_any_associated(priv)) {
-		IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
-		return;
-	}
-	/*
-	 * There is no easy and better way to force reset the radio,
-	 * the only known method is switching channel which will force to
-	 * reset and tune the radio.
-	 * Use internal short scan (single channel) operation to should
-	 * achieve this objective.
-	 * Driver should reset the radio when number of consecutive missed
-	 * beacon, or any other uCode error condition detected.
-	 */
-	IWL_DEBUG_INFO(priv, "perform radio reset.\n");
-	iwl_legacy_internal_short_hw_scan(priv);
-}
-
-
-int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
+int iwl_legacy_force_reset(struct iwl_priv *priv, bool external)
 {
 	struct iwl_force_reset *force_reset;
 
 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 		return -EINVAL;
 
-	if (mode >= IWL_MAX_FORCE_RESET) {
-		IWL_DEBUG_INFO(priv, "invalid reset request.\n");
-		return -EINVAL;
-	}
-	force_reset = &priv->force_reset[mode];
+	force_reset = &priv->force_reset;
 	force_reset->reset_request_count++;
 	if (!external) {
 		if (force_reset->last_force_reset_jiffies &&
@@ -1754,37 +1727,34 @@ int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
 	}
 	force_reset->reset_success_count++;
 	force_reset->last_force_reset_jiffies = jiffies;
-	IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
-	switch (mode) {
-	case IWL_RF_RESET:
-		_iwl_legacy_force_rf_reset(priv);
-		break;
-	case IWL_FW_RESET:
-		/*
-		 * if the request is from external(ex: debugfs),
-		 * then always perform the request in regardless the module
-		 * parameter setting
-		 * if the request is from internal (uCode error or driver
-		 * detect failure), then fw_restart module parameter
-		 * need to be check before performing firmware reload
-		 */
-		if (!external && !priv->cfg->mod_params->restart_fw) {
-			IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
-				       "module parameter setting\n");
-			break;
-		}
-		IWL_ERR(priv, "On demand firmware reload\n");
-		/* Set the FW error flag -- cleared on iwl_down */
-		set_bit(STATUS_FW_ERROR, &priv->status);
-		wake_up_interruptible(&priv->wait_command_queue);
-		/*
-		 * Keep the restart process from trying to send host
-		 * commands by clearing the INIT status bit
-		 */
-		clear_bit(STATUS_READY, &priv->status);
-		queue_work(priv->workqueue, &priv->restart);
-		break;
+
+	/*
+	 * if the request is from external(ex: debugfs),
+	 * then always perform the request in regardless the module
+	 * parameter setting
+	 * if the request is from internal (uCode error or driver
+	 * detect failure), then fw_restart module parameter
+	 * need to be check before performing firmware reload
+	 */
+
+	if (!external && !priv->cfg->mod_params->restart_fw) {
+		IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
+			       "module parameter setting\n");
+		return 0;
 	}
+
+	IWL_ERR(priv, "On demand firmware reload\n");
+
+	/* Set the FW error flag -- cleared on iwl_down */
+	set_bit(STATUS_FW_ERROR, &priv->status);
+	wake_up_interruptible(&priv->wait_command_queue);
+	/*
+	 * Keep the restart process from trying to send host
+	 * commands by clearing the INIT status bit
+	 */
+	clear_bit(STATUS_READY, &priv->status);
+	queue_work(priv->workqueue, &priv->restart);
+
 	return 0;
 }
 
@@ -1879,7 +1849,7 @@ static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
 	if (time_after(jiffies, timeout)) {
 		IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
 				q->id, priv->cfg->base_params->wd_timeout);
-		ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
+		ret = iwl_legacy_force_reset(priv, false);
 		return (ret == -EAGAIN) ? 0 : 1;
 	}
 

drivers/net/wireless/iwlegacy/iwl-core.h

@@ -204,8 +204,6 @@ struct iwl_mod_params {
  *	to the deviation to achieve the desired led frequency.
  *	The detail algorithm is described in iwl-led.c
  * @chain_noise_num_beacons: number of beacons used to compute chain noise
- * @plcp_delta_threshold: plcp error rate threshold used to trigger
- *	radio tuning when there is a high receiving plcp error rate
  * @wd_timeout: TX queues watchdog timeout
  * @temperature_kelvin: temperature report by uCode in kelvin
  * @max_event_log_size: size of event log buffer size for ucode event logging
@@ -226,7 +224,6 @@ struct iwl_base_params {
 
 	u16 led_compensation;
 	int chain_noise_num_beacons;
-	u8 plcp_delta_threshold;
 	unsigned int wd_timeout;
 	bool temperature_kelvin;
 	u32 max_event_log_size;
@@ -438,7 +435,7 @@ int iwl_legacy_mac_hw_scan(struct ieee80211_hw *hw,
 		    struct ieee80211_vif *vif,
 		    struct cfg80211_scan_request *req);
 void iwl_legacy_internal_short_hw_scan(struct iwl_priv *priv);
-int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external);
+int iwl_legacy_force_reset(struct iwl_priv *priv, bool external);
 u16 iwl_legacy_fill_probe_req(struct iwl_priv *priv,
 			struct ieee80211_mgmt *frame,
 		       const u8 *ta, const u8 *ie, int ie_len, int left);