qcacmn: fix monitor packets radiotap channel incorrect issue

The channel number is always 0 from HAL RX PPDU TLV, then monitor
mode frames radiotap channel frequency is always 2407, get the
correct channel number that we saved when set monitor channel.

Change-Id: Ib927fe9aca3a4c1f98845fe37c9b1d37d1d6cf5a
CRs-Fixed: 2471161

dp/inc/cdp_txrx_mon.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -149,4 +149,21 @@ static inline QDF_STATUS cdp_reset_monitor_mode
 
 	return soc->ops->mon_ops->txrx_reset_monitor_mode(pdev);
 }
+
+static inline void cdp_record_monitor_chan_num
+(ol_txrx_soc_handle soc, struct cdp_pdev *pdev, int chan_num)
+{
+	if (!soc || !soc->ops) {
+		QDF_TRACE(QDF_MODULE_ID_CDP, QDF_TRACE_LEVEL_DEBUG,
+			  "%s: Invalid Instance", __func__);
+		QDF_BUG(0);
+		return;
+	}
+
+	if (!soc->ops->mon_ops ||
+	    !soc->ops->mon_ops->txrx_monitor_record_channel)
+		return;
+
+	soc->ops->mon_ops->txrx_monitor_record_channel(pdev, chan_num);
+}
 #endif

dp/inc/cdp_txrx_ops.h

@@ -720,6 +720,9 @@ struct cdp_mon_ops {
 	/* HK advance monitor filter support */
 	QDF_STATUS (*txrx_set_advance_monitor_filter)
 		(struct cdp_pdev *pdev, struct cdp_monitor_filter *filter_val);
+
+	void (*txrx_monitor_record_channel)
+		(struct cdp_pdev *, int val);
 };
 
 struct cdp_host_stats_ops {

dp/wifi3.0/dp_main.c

@@ -4874,6 +4874,9 @@ static void dp_vdev_detach_wifi3(struct cdp_vdev *vdev_handle,
 
 	qdf_spin_unlock_bh(&pdev->vdev_list_lock);
 free_vdev:
+	if (wlan_op_mode_monitor == vdev->opmode)
+		pdev->monitor_vdev = NULL;
+
 	qdf_mem_free(vdev);
 
 	if (callback)
@@ -6408,6 +6411,20 @@ dp_pdev_set_advance_monitor_filter(struct cdp_pdev *pdev_handle,
 	return QDF_STATUS_SUCCESS;
 }
 
+/**
+ * dp_pdev_set_monitor_channel() - set monitor channel num in pdev
+ * @pdev_handle: Datapath PDEV handle
+ *
+ * Return: None
+ */
+static
+void dp_pdev_set_monitor_channel(struct cdp_pdev *pdev_handle, int chan_num)
+{
+	struct dp_pdev *pdev = (struct dp_pdev *)pdev_handle;
+
+	pdev->mon_chan_num = chan_num;
+}
+
 /**
  * dp_get_pdev_id_frm_pdev() - get pdev_id
  * @pdev_handle: Datapath PDEV handle
@@ -8960,6 +8977,7 @@ static struct cdp_mon_ops dp_ops_mon = {
 	.txrx_reset_monitor_mode = dp_reset_monitor_mode,
 	/* Added support for HK advance filter */
 	.txrx_set_advance_monitor_filter = dp_pdev_set_advance_monitor_filter,
+	.txrx_monitor_record_channel = dp_pdev_set_monitor_channel,
 };
 
 static struct cdp_host_stats_ops dp_ops_host_stats = {

dp/wifi3.0/dp_rx_mon_dest.c

@@ -950,6 +950,12 @@ QDF_STATUS dp_rx_mon_deliver(struct dp_soc *soc, uint32_t mac_id,
 		pdev->ppdu_info.rx_status.device_id = soc->device_id;
 		pdev->ppdu_info.rx_status.chan_noise_floor =
 			pdev->chan_noise_floor;
+		/*
+		 * if chan_num is not fetched correctly from ppdu RX TLV,
+		 * get it from pdev saved.
+		 */
+		if (pdev->ppdu_info.rx_status.chan_num == 0)
+			pdev->ppdu_info.rx_status.chan_num = pdev->mon_chan_num;
 
 		qdf_nbuf_update_radiotap(&(pdev->ppdu_info.rx_status),
 			mon_mpdu, sizeof(struct rx_pkt_tlvs));

dp/wifi3.0/dp_types.h

@@ -1380,6 +1380,9 @@ struct dp_pdev {
 	/* Monitor mode interface and status storage */
 	struct dp_vdev *monitor_vdev;
 
+	/* Monitor mode operation channel */
+	int mon_chan_num;
+
 	/* monitor mode lock */
 	qdf_spinlock_t mon_lock;