qcacld-3.0: Handle unregistered OS RX handles in DP RX Thread

On association completion, RX handles are registered with the DP layer
as a part of cdp_vdev_register. It is possible that immediately after
association, host receives RX packets, but RX handles have not been
registered for the vdev with DP layer.

Drop packets in DP RX Thread if OS RX handles are not found for the
vdev.

Change-Id: I3bbd489ec9c5e6f6267521818663b123a85bb3f9
CRs-Fixed: 2419376

core/dp/txrx3.0/dp_rx_thread.c

@@ -102,7 +102,7 @@ static void dp_rx_tm_thread_dump_stats(struct dp_rx_thread *rx_thread)
 	if (!total_queued)
 		return;
 
-	dp_info("thread:%u - qlen:%u queued:(total:%u %s) dequeued:%u stack:%u max_len:%u invalid(peer:%u vdev:%u others:%u)",
+	dp_info("thread:%u - qlen:%u queued:(total:%u %s) dequeued:%u stack:%u max_len:%u invalid(peer:%u vdev:%u rx-handle:%u others:%u)",
 		rx_thread->id,
 		qdf_nbuf_queue_head_qlen(&rx_thread->nbuf_queue),
 		total_queued,
@@ -112,6 +112,7 @@ static void dp_rx_tm_thread_dump_stats(struct dp_rx_thread *rx_thread)
 		rx_thread->stats.nbufq_max_len,
 		rx_thread->stats.dropped_invalid_peer,
 		rx_thread->stats.dropped_invalid_vdev,
+		rx_thread->stats.dropped_invalid_os_rx_handles,
 		rx_thread->stats.dropped_others);
 }
 
@@ -299,9 +300,7 @@ static int dp_rx_thread_process_nbufq(struct dp_rx_thread *rx_thread)
 		cdp_get_os_rx_handles_from_vdev(soc, vdev, &stack_fn,
 						&osif_vdev);
 		if (!stack_fn || !osif_vdev) {
-			dp_alert("stack_fn or osif_vdev is null, pkt dropped!");
-			QDF_BUG(0);
-			rx_thread->stats.dropped_others +=
+			rx_thread->stats.dropped_invalid_os_rx_handles +=
 							num_list_elements;
 			qdf_nbuf_list_free(nbuf_list);
 			goto dequeue_rx_thread;

core/dp/txrx3.0/dp_rx_thread.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2019 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
@@ -63,6 +63,7 @@ struct dp_rx_thread_stats {
 	unsigned int nbufq_max_len;
 	unsigned int dropped_invalid_vdev;
 	unsigned int dropped_invalid_peer;
+	unsigned int dropped_invalid_os_rx_handles;
 	unsigned int dropped_others;
 };