qcacmn: SKB buf memory Leak@ Func dp_pdev_nbuf_alloc_and_map

Fix the skb leak in dp_rx_process where rx descriptor cookie
validity fails. This skb should be cleaned up as part of the
rx desc and nbuf free function called during the driver unload.
However this will ensure that the skb released and added rx desc
added to the free list during dp_rx_process itself.

Add skb map, unmap functions, line numbers and if the nbuf is
mapped or unmapped to the nbuf tracking table. This debug info
will be logged once the skb is leaked.

Change-Id: I52dbf38922be20fc0aaea380e0e572af16de773e
CRs-Fixed: 2662992

dp/wifi3.0/dp_rx.c

@@ -1943,6 +1943,20 @@ more_data:
 		status = dp_rx_desc_sanity(soc, hal_soc, hal_ring_hdl,
 					   ring_desc, rx_desc);
 		if (QDF_IS_STATUS_ERROR(status)) {
+			if (qdf_unlikely(rx_desc && rx_desc->nbuf)) {
+				qdf_assert_always(rx_desc->unmapped);
+				qdf_nbuf_unmap_nbytes_single(
+							soc->osdev,
+							rx_desc->nbuf,
+							QDF_DMA_FROM_DEVICE,
+							RX_DATA_BUFFER_SIZE);
+				rx_desc->unmapped = 1;
+				qdf_nbuf_free(rx_desc->nbuf);
+				dp_rx_add_to_free_desc_list(
+							&head[rx_desc->pool_id],
+							&tail[rx_desc->pool_id],
+							rx_desc);
+			}
 			hal_srng_dst_get_next(hal_soc, hal_ring_hdl);
 			continue;
 		}
@@ -2464,7 +2478,7 @@ QDF_STATUS dp_rx_vdev_detach(struct dp_vdev *vdev)
 
 	if (vdev->osif_rx_flush) {
 		ret = vdev->osif_rx_flush(vdev->osif_vdev, vdev->vdev_id);
-		if (!ret) {
+		if (!QDF_IS_STATUS_SUCCESS(ret)) {
 			dp_err("Failed to flush rx pkts for vdev %d\n",
 			       vdev->vdev_id);
 			return ret;