mwifiex: use del_timer_sync instead of del_timer

Use SMP safe del_timer_sync instead of del_timer for cancelling
timers.
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -142,7 +142,7 @@ mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv,
 	mwifiex_11n_dispatch_pkt(priv, tbl, (tbl->start_win + tbl->win_size) &
 					    (MAX_TID_VALUE - 1));
 
-	del_timer(&tbl->timer_context.timer);
+	del_timer_sync(&tbl->timer_context.timer);
 
 	spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 	list_del(&tbl->list);

drivers/net/wireless/mwifiex/cmdevt.c

@@ -786,7 +786,7 @@ int mwifiex_process_cmdresp(struct mwifiex_adapter *adapter)
 	unsigned long flags;
 
 	/* Now we got response from FW, cancel the command timer */
-	del_timer(&adapter->cmd_timer);
+	del_timer_sync(&adapter->cmd_timer);
 
 	if (!adapter->curr_cmd || !adapter->curr_cmd->resp_skb) {
 		resp = (struct host_cmd_ds_command *) adapter->upld_buf;

drivers/net/wireless/mwifiex/init.c

@@ -620,7 +620,7 @@ mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 	/* cancel current command */
 	if (adapter->curr_cmd) {
 		dev_warn(adapter->dev, "curr_cmd is still in processing\n");
-		del_timer(&adapter->cmd_timer);
+		del_timer_sync(&adapter->cmd_timer);
 		mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 		adapter->curr_cmd = NULL;
 	}

drivers/net/wireless/mwifiex/main.c

@@ -194,7 +194,7 @@ static int mwifiex_unregister(struct mwifiex_adapter *adapter)
 	if (adapter->if_ops.cleanup_if)
 		adapter->if_ops.cleanup_if(adapter);
 
-	del_timer(&adapter->cmd_timer);
+	del_timer_sync(&adapter->cmd_timer);
 
 	/* Free private structures */
 	for (i = 0; i < adapter->priv_num; i++) {