qcacmn: add DMA address validity checking for TX data

HW access to MSDU link Ext descriptor with NULL address,
whie from host MSDU Ext pool and related ring entry history,
not find NULL address recorded. In case the MSDU Ext descriptor
has been overwritten before issue happened, add DMA address
validity checking in MSDU Ext descriptor filled from TSO
segment fragments and also buffer address in ring entry.

Change-Id: I11dc1d0211530a5f01b515473b2458df15a5f4cc
CRs-Fixed: 2498359

dp/wifi3.0/dp_tx.c

@@ -397,6 +397,9 @@ static void dp_tx_prepare_tso_ext_desc(struct qdf_tso_seg_t *tso_seg,
 		uint32_t lo = 0;
 		uint32_t hi = 0;
 
+		qdf_assert_always((tso_seg->tso_frags[num_frag].paddr) &&
+				  (tso_seg->tso_frags[num_frag].length));
+
 		qdf_dmaaddr_to_32s(
 			tso_seg->tso_frags[num_frag].paddr, &lo, &hi);
 		hal_tx_ext_desc_set_buffer(ext_desc, num_frag, lo, hi,
@@ -1082,6 +1085,8 @@ static QDF_STATUS dp_tx_hw_enqueue(struct dp_soc *soc, struct dp_vdev *vdev,
 		dma_addr = qdf_nbuf_mapped_paddr_get(tx_desc->nbuf);
 	}
 
+	qdf_assert_always(dma_addr);
+
 	hal_tx_desc_set_fw_metadata(hal_tx_desc_cached, fw_metadata);
 	hal_tx_desc_set_buf_addr(hal_tx_desc_cached,
 					dma_addr, bm_id, tx_desc->id,