mwifiex: move del_timer_sync(scan_delay_timer) call to fix memleak

Currently it is in mwifiex_adapter_cleanup() which doesn't get
called if driver initialization is failed causing memory leak.

scan_delay_timer is initialized in mwifiex_register(), so it
should be deleted in mwifiex_unregister(). Hence it has been
moved to appropriate place.
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/init.c

@@ -378,18 +378,11 @@ static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 static void
 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 {
-	int i;
-
 	if (!adapter) {
 		pr_err("%s: adapter is NULL\n", __func__);
 		return;
 	}
 
-	for (i = 0; i < adapter->priv_num; i++) {
-		if (adapter->priv[i])
-			del_timer_sync(&adapter->priv[i]->scan_delay_timer);
-	}
-
 	mwifiex_cancel_all_pending_cmd(adapter);
 
 	/* Free lock variables */

drivers/net/wireless/mwifiex/main.c

@@ -197,6 +197,7 @@ static int mwifiex_unregister(struct mwifiex_adapter *adapter)
 	for (i = 0; i < adapter->priv_num; i++) {
 		if (adapter->priv[i]) {
 			mwifiex_free_curr_bcn(adapter->priv[i]);
+			del_timer_sync(&adapter->priv[i]->scan_delay_timer);
 			kfree(adapter->priv[i]);
 		}
 	}