qcacmn: unmap raw mode nbufs in failure cases

currently we are not unmapping the nbuf which was
already mapped in dp_tx_raw_prepare in failure cases
We always need to unmap and free the nbuf if its mapped.

Change-Id: Ia5e6a31a7aac356a934ff2496d0542039bc3ece7
CRs-Fixed: 2462518

dp/wifi3.0/dp_tx.c

@@ -946,6 +946,26 @@ error:
 
 }
 
+/**
+ * dp_tx_raw_prepare_unset() - unmap the chain of nbufs belonging to RAW frame.
+ * @soc: DP soc handle
+ * @nbuf: Buffer pointer
+ *
+ * unmap the chain of nbufs that belong to this RAW frame.
+ *
+ * Return: None
+ */
+static void dp_tx_raw_prepare_unset(struct dp_soc *soc,
+				    qdf_nbuf_t nbuf)
+{
+	qdf_nbuf_t cur_nbuf = nbuf;
+
+	do {
+		qdf_nbuf_unmap(soc->osdev, cur_nbuf, QDF_DMA_TO_DEVICE);
+		cur_nbuf = qdf_nbuf_next(cur_nbuf);
+	} while (cur_nbuf);
+}
+
 /**
  * dp_tx_hw_enqueue() - Enqueue to TCL HW for transmit
  * @soc: DP Soc Handle
@@ -1514,7 +1534,6 @@ qdf_nbuf_t dp_tx_send_msdu_multiple(struct dp_vdev *vdev, qdf_nbuf_t nbuf,
 	bool is_cce_classified = false;
 	QDF_STATUS status;
 	uint16_t htt_tcl_metadata = 0;
-
 	struct dp_tx_queue *tx_q = &msdu_info->tx_queue;
 	void *hal_srng = soc->tcl_data_ring[tx_q->ring_id].hal_srng;
 	struct cdp_tid_tx_stats *tid_stats = NULL;
@@ -2208,6 +2227,9 @@ qdf_nbuf_t dp_tx_send(void *vap_dev, qdf_nbuf_t nbuf)
 send_multiple:
 	nbuf = dp_tx_send_msdu_multiple(vdev, nbuf, &msdu_info);
 
+	if (qdf_unlikely(nbuf && msdu_info.frm_type == dp_tx_frm_raw))
+		dp_tx_raw_prepare_unset(vdev->pdev->soc, nbuf);
+
 	return nbuf;
 }