qcacld-3.0: Test PKT_CAPTURE_REGISTER_EVENT bit before processing packets

Currently, packet capture packets are processed until the mon list
is empty. There can be situation that while mon list is not empty and
mon thread is running, mon interface is deleted and as part of it 
PKT_CAPTURE_REGISTER_EVENT is cleared. After clearing the bit, interface
deletion will wait for completion of mon_register_event and flush the
remaining packets in mon list without processing them. In this case 
as mon thread is already running and processing the packets from mon list
without check for PKT_CAPTURE_REGISTER_EVENT bit, it may lead to
timeout in deletion of mon interface in case of high throughput scenarios.

To avoid this situation, add a check to test PKT_CAPTURE_REGISTER_EVENT
each time before processing a packet from mon list.

Change-Id: I21e7adc0149c2330f6008d54db8576ca705f2b55
CRs-Fixed: 3475349

components/pkt_capture/core/src/wlan_pkt_capture_mon_thread.c

@@ -224,6 +224,11 @@ pkt_capture_process_from_queue(struct pkt_capture_mon_context *mon_ctx)
 
 	spin_lock_bh(&mon_ctx->mon_queue_lock);
 	while (!list_empty(&mon_ctx->mon_thread_queue)) {
+		if (!test_bit(PKT_CAPTURE_REGISTER_EVENT,
+			      &mon_ctx->mon_event_flag)) {
+			complete(&mon_ctx->mon_register_event);
+			break;
+		}
 		pkt = list_first_entry(&mon_ctx->mon_thread_queue,
 				       struct pkt_capture_mon_pkt, list);
 		list_del(&pkt->list);