ath6kl: don't power down hardware when interface is down

Jouni reported that my patch "ath6kl: power down hardware when interface
is down" caused a regression on his x86 boxes and scan didn't work anymore.
I was able to reproduce the problem by disabling all debug messages.

So there has to be a race condition somewhere in the code and disable the
functionality until the race is fixed. Now hardware is powered from the
point where module is loaded until it's removed.

Reported-by: Jouni Malinen <jouni@qca.qualcomm.com>
Tested-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/init.c

@@ -1613,12 +1613,6 @@ int ath6kl_core_init(struct ath6kl *ar)
 	 */
 	memcpy(ndev->dev_addr, ar->mac_addr, ETH_ALEN);
 
-	ret = ath6kl_init_hw_stop(ar);
-	if (ret) {
-		ath6kl_err("Failed to stop hardware: %d\n", ret);
-		goto err_htc_cleanup;
-	}
-
 	return ret;
 
 err_rxbuf_cleanup:

drivers/net/wireless/ath/ath6kl/main.c

@@ -1062,12 +1062,6 @@ struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
 static int ath6kl_open(struct net_device *dev)
 {
 	struct ath6kl_vif *vif = netdev_priv(dev);
-	int ret;
-
-	/* FIXME: how to handle multi vif support? */
-	ret = ath6kl_init_hw_start(vif->ar);
-	if (ret)
-		return ret;
 
 	set_bit(WLAN_ENABLED, &vif->flags);
 
@@ -1084,7 +1078,6 @@ static int ath6kl_close(struct net_device *dev)
 {
 	struct ath6kl *ar = ath6kl_priv(dev);
 	struct ath6kl_vif *vif = netdev_priv(dev);
-	int ret;
 
 	netif_stop_queue(dev);
 
@@ -1099,11 +1092,6 @@ static int ath6kl_close(struct net_device *dev)
 
 	ath6kl_cfg80211_scan_complete_event(vif, true);
 
-	/* FIXME: how to handle multi vif support? */
-	ret = ath6kl_init_hw_stop(ar);
-	if (ret)
-		return ret;
-
 	clear_bit(WLAN_ENABLED, &vif->flags);
 
 	return 0;