qcacld-3.0: Select default channel is no scan results present

Currently if the driver does not find any scan results
in the ACS scan, it selects a best channel as the PCl
channel by filtering the PCl list based upon the start
and end channel, which may not be correct everytime
as start and end channel does not specify the channels
to be selected.

Fix is to select a default operating channel from the
acs list itself, if no scan results are present.

Change-Id: I9a76957087b9349da66545e0fcaede2355f732cd
CRs-Fixed: 2504796

core/sap/src/sap_ch_select.c

@@ -2535,96 +2535,6 @@ static bool sap_is_ch_non_overlap(struct sap_context *sap_ctx, uint16_t ch)
 	return false;
 }
 
-#ifdef FEATURE_WLAN_CH_AVOID
-static uint8_t get_channel_from_safe_channels(mac_handle_t mac_handle,
-					      struct sap_context *sap_ctx)
-{
-	uint8_t i, first_safe_ch_in_range = SAP_CHANNEL_NOT_SELECTED;
-	enum channel_state ch_type;
-	uint32_t start_ch_num = sap_ctx->acs_cfg->start_ch;
-	uint32_t end_ch_num = sap_ctx->acs_cfg->end_ch;
-	struct mac_context *mac_ctx = MAC_CONTEXT(mac_handle);
-
-
-	for (i = 0; i < NUM_CHANNELS; i++) {
-		if ((safe_channels[i].channelNumber < start_ch_num) ||
-		    (safe_channels[i].channelNumber > end_ch_num))
-			continue;
-
-		ch_type = wlan_reg_get_channel_state(mac_ctx->pdev,
-				safe_channels[i].channelNumber);
-
-		if ((ch_type == CHANNEL_STATE_DISABLE) ||
-			(ch_type == CHANNEL_STATE_INVALID))
-			continue;
-		if ((!mac_ctx->mlme_cfg->dfs_cfg.dfs_master_capable) &&
-		    (CHANNEL_STATE_DFS == ch_type)) {
-			sap_debug("DFS master mode disabled. Skip DFS channel %d",
-				  safe_channels[i].channelNumber);
-			continue;
-		}
-		if ((sap_ctx->dfs_mode == ACS_DFS_MODE_DISABLE) &&
-		    (CHANNEL_STATE_DFS == ch_type))
-			continue;
-
-		if (safe_channels[i].isSafe == true) {
-			sap_debug("channel %d in the configuration is safe",
-				  safe_channels[i].channelNumber);
-			first_safe_ch_in_range = safe_channels[i].channelNumber;
-			break;
-		}
-
-		sap_debug("channel %d in the configuration is unsafe",
-			  safe_channels[i].channelNumber);
-	}
-
-	/* if no channel selected return SAP_CHANNEL_NOT_SELECTED */
-	return first_safe_ch_in_range;
-}
-#else
-static uint8_t get_channel_from_safe_channels(mac_handle_t mac_handle,
-					      struct sap_context *sap_ctx)
-{
-	uint32_t start_ch_num = sap_ctx->acs_cfg->start_ch;
-
-	sap_ctx->acs_cfg->pri_ch = start_ch_num;
-	sap_ctx->acs_cfg->ht_sec_ch = 0;
-
-	/* pick the first channel in configured range */
-	return start_ch_num;
-}
-#endif /* FEATURE_WLAN_CH_AVOID */
-/**
- * sap_select_channel_no_scan_result() - select SAP channel when no scan results
- * are available.
- * @sap_ctx: Sap context
- *
- * Returns: channel number if success, 0 otherwise
- */
-static uint8_t sap_select_channel_no_scan_result(mac_handle_t mac_handle,
-						 struct sap_context *sap_ctx)
-{
-	uint8_t i, channel = SAP_CHANNEL_NOT_SELECTED;
-	uint32_t start_ch_num = sap_ctx->acs_cfg->start_ch;
-	uint32_t end_ch_num = sap_ctx->acs_cfg->end_ch;
-
-	sap_debug("start - end: %d - %d", start_ch_num, end_ch_num);
-	/* get a channel in PCL and within the range */
-	for (i = 0; i < sap_ctx->acs_cfg->pcl_ch_count; i++) {
-		if ((sap_ctx->acs_cfg->pcl_channels[i] < start_ch_num) ||
-		    (sap_ctx->acs_cfg->pcl_channels[i] > end_ch_num))
-			continue;
-
-		channel = sap_ctx->acs_cfg->pcl_channels[i];
-		break;
-	}
-
-	if (channel == SAP_CHANNEL_NOT_SELECTED)
-		channel = get_channel_from_safe_channels(mac_handle, sap_ctx);
-
-	return channel;
-}
-
 uint8_t sap_select_channel(mac_handle_t mac_handle,
 			   struct sap_context *sap_ctx,
 			   qdf_list_t *scan_list)
@@ -2661,7 +2571,7 @@ uint8_t sap_select_channel(mac_handle_t mac_handle,
 #ifndef SOFTAP_CHANNEL_RANGE
 		return SAP_CHANNEL_NOT_SELECTED;
 #else
-		return sap_select_channel_no_scan_result(mac_handle, sap_ctx);
+		return sap_select_default_oper_chan(sap_ctx->acs_cfg);
 #endif
 	}