qcacld-3.0: check vdev del event when processing rx thread

If many packets are queued into rx thread, processing
the packets can delay the vdev del event processing.
To fix this, check for vdev_del_event when processing
packets and if vdev del event is set, do gro flush
and continue packet processing.

Change-Id: I589e53f55f11c7ad8d71c532c47ae2584e5db2a7
CRs-Fixed: 3152037

core/dp/txrx3.0/dp_rx_thread.c

@@ -437,14 +437,17 @@ static qdf_nbuf_t dp_rx_tm_thread_dequeue(struct dp_rx_thread *rx_thread)
  *
  * Returns: should yield or not
  */
-static inline bool dp_rx_thread_should_yield(uint32_t iter)
+static inline bool dp_rx_thread_should_yield(struct dp_rx_thread *rx_thread,
+					     uint32_t iter)
 {
-	if (iter >= DP_RX_THREAD_YIELD_PKT_CNT)
+	if (iter >= DP_RX_THREAD_YIELD_PKT_CNT ||
+	    qdf_test_bit(RX_VDEV_DEL_EVENT, &rx_thread->event_flag))
 		return true;
 	return false;
 }
 #else
-static inline bool dp_rx_thread_should_yield(uint32_t iter)
+static inline bool dp_rx_thread_should_yield(struct dp_rx_thread *rx_thread,
+					     uint32_t iter)
 {
 	return false;
 }
@@ -504,7 +507,8 @@ static int dp_rx_thread_process_nbufq(struct dp_rx_thread *rx_thread)
 			rx_thread->stats.nbuf_sent_to_stack +=
 							num_list_elements;
 		}
-		if (unlikely(dp_rx_thread_should_yield(iterates))) {
+		if (qdf_unlikely(dp_rx_thread_should_yield(rx_thread,
+							   iterates))) {
 			rx_thread->stats.rx_nbufq_loop_yield++;
 			break;
 		}
@@ -599,6 +603,8 @@ static int dp_rx_thread_sub_loop(struct dp_rx_thread *rx_thread, bool *shutdown)
 						  &rx_thread->event_flag)) {
 			rx_thread->stats.gro_flushes_by_vdev_del++;
 			qdf_event_set(&rx_thread->vdev_del_event);
+			if (qdf_nbuf_queue_head_qlen(&rx_thread->nbuf_queue))
+				continue;
 		}
 
 		if (qdf_atomic_test_and_clear_bit(RX_SUSPEND_EVENT,