mwifiex: disable transmission buffer aggregation for AMSDU packets

Padding per MSDU will affect the length of next packet and hence
the exact length of next packet is uncertain here.

Also, aggregation of transmission buffer, while downloading the
data to the card, wont gain much on the AMSDU packets as the AMSDU
packets utilizes the transmission buffer space to the maximum
(adapter->tx_buf_size).
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/11n_aggr.c

@@ -233,11 +233,19 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv,
 
 	skb_push(skb_aggr, headroom);
 
-	tx_param.next_pkt_len = ((pra_list->total_pkts_size) ?
-				 (((pra_list->total_pkts_size) >
-				   adapter->tx_buf_size) ? adapter->
-				  tx_buf_size : pra_list->total_pkts_size +
-				  LLC_SNAP_LEN + sizeof(struct txpd)) : 0);
+	/*
+	 * Padding per MSDU will affect the length of next
+	 * packet and hence the exact length of next packet
+	 * is uncertain here.
+	 *
+	 * Also, aggregation of transmission buffer, while
+	 * downloading the data to the card, wont gain much
+	 * on the AMSDU packets as the AMSDU packets utilizes
+	 * the transmission buffer space to the maximum
+	 * (adapter->tx_buf_size).
+	 */
+	tx_param.next_pkt_len = 0;
+
 	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
 					     skb_aggr->data,
 					     skb_aggr->len, &tx_param);