qcacld-3.0: Send mgmt frame with NULL channel

It won't send mgmt frame with NULL channel information currently,
which is different to other branches. Add this change because up layer
pass NULL channel information when tx mgmt frame in some platform.

Change-Id: I689d64789187fe0df03ed57ef0ff10c5157aeeb6
CRs-Fixed: 2459485

os_if/p2p/src/wlan_cfg80211_p2p.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2019 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
@@ -425,16 +425,17 @@ int wlan_cfg80211_mgmt_tx(struct wlan_objmgr_vdev *vdev,
 	struct p2p_mgmt_tx mgmt_tx = {0};
 	struct wlan_objmgr_psoc *psoc;
 	uint8_t vdev_id;
+	uint32_t channel = 0;
 
 	if (!vdev) {
 		cfg80211_err("invalid vdev object");
 		return -EINVAL;
 	}
 
-	if (!chan) {
-		cfg80211_err("invalid channel");
-		return -EINVAL;
-	}
+	if (chan)
+		channel = (uint32_t)wlan_freq_to_chan(chan->center_freq);
+	else
+		cfg80211_debug("NULL chan, set channel to 0");
 
 	psoc = wlan_vdev_get_psoc(vdev);
 	vdev_id = wlan_vdev_get_id(vdev);
@@ -450,7 +451,6 @@ int wlan_cfg80211_mgmt_tx(struct wlan_objmgr_vdev *vdev,
 	if (wait > MAX_OFFCHAN_TIME_FOR_DNBS) {
 		int ret;
 		bool ok;
-		uint32_t channel = wlan_freq_to_chan(chan->center_freq);
 
 		ret = policy_mgr_is_chan_ok_for_dnbs(psoc, channel, &ok);
 		if (QDF_IS_STATUS_ERROR(ret)) {
@@ -466,7 +466,7 @@ int wlan_cfg80211_mgmt_tx(struct wlan_objmgr_vdev *vdev,
 	}
 
 	mgmt_tx.vdev_id = (uint32_t)vdev_id;
-	mgmt_tx.chan = (uint32_t)wlan_freq_to_chan(chan->center_freq);
+	mgmt_tx.chan = channel;
 	mgmt_tx.wait = wait;
 	mgmt_tx.len = len;
 	mgmt_tx.no_cck = (uint32_t)no_cck;