qcacmn: Clean-up all peers in-case of SSR

Current driver doesn't clean-up all the peers because the TARGET
state is not marked as reset and due to which nobody is there to
mimic fake peer unmap events to reduce the reference count.

Also, there is no peer delete API being called as well in case of SSR.
Identify the TARGET state in-case of SSR by calling HDD callback
and mimic the unmap events and call peer delete API as well.

CRs-Fixed: 2350285
Change-Id: I878b7a15701c01ac9ef80010086f7e868a631a74

dp/wifi3.0/dp_main.c

@@ -4273,9 +4273,26 @@ static void dp_vdev_flush_peers(struct dp_vdev *vdev)
 	}
 	qdf_spin_unlock_bh(&soc->peer_ref_mutex);
 
-	for (i = 0; i < j ; i++)
+	for (i = 0; i < j ; i++) {
+		peer = dp_peer_find_by_id(soc, peer_ids[i]);
+		if (peer) {
+			dp_info("peer: %pM is getting flush",
+				peer->mac_addr.raw);
+			dp_peer_delete_wifi3(peer, 0);
+			/*
+			 * we need to call dp_peer_unref_del_find_by_id()
+			 * to remove additional ref count incremented
+			 * by dp_peer_find_by_id() call.
+			 *
+			 * Hold the ref count while executing
+			 * dp_peer_delete_wifi3() call.
+			 *
+			 */
+			dp_peer_unref_del_find_by_id(peer);
+		}
 		dp_rx_peer_unmap_handler(soc, peer_ids[i], vdev->vdev_id,
 					 NULL, 0);
+	}
 
 	qdf_mem_free(peer_ids);
 
@@ -4313,7 +4330,8 @@ static void dp_vdev_detach_wifi3(struct cdp_vdev *vdev_handle,
 	 * this will free all references held due to missing
 	 * unmap commands from Target
 	 */
-	if (hif_get_target_status(soc->hif_handle) == TARGET_STATUS_RESET)
+	if ((hif_get_target_status(soc->hif_handle) == TARGET_STATUS_RESET) ||
+	    !hif_is_target_ready(HIF_GET_SOFTC(soc->hif_handle)))
 		dp_vdev_flush_peers(vdev);
 
 	/*
@@ -5093,9 +5111,6 @@ void dp_peer_unref_delete(void *peer_handle)
 	uint16_t vdev_id;
 	bool delete_vdev;
 
-	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
-		  "%s: peer %pK ref_cnt(before decrement): %d\n", __func__,
-		  peer, qdf_atomic_read(&peer->ref_cnt));
 	/*
 	 * Hold the lock all the way from checking if the peer ref count
 	 * is zero until the peer references are removed from the hash
@@ -5876,7 +5891,6 @@ dp_aggregate_pdev_ctrl_frames_stats(struct dp_pdev *pdev)
 					FL("DP Peer deletion in progress"));
 				continue;
 			}
-
 			qdf_atomic_inc(&peer->ref_cnt);
 			waitcnt = 0;
 			dp_peer_rxtid_stats(peer, dp_rx_bar_stats_cb, pdev);

hif/src/hif_main.c

@@ -1131,9 +1131,14 @@ bool hif_is_target_ready(struct hif_softc *scn)
 
 	if (cbk && cbk->is_target_ready)
 		return cbk->is_target_ready(cbk->context);
-
-	return false;
+	/*
+	 * if callback is not registered then there is no way to determine
+	 * if target is ready. In-such case return true to indicate that
+	 * target is ready.
+	 */
+	return true;
 }
+qdf_export_symbol(hif_is_target_ready);
 
 /**
  * hif_batch_send() - API to access hif specific function