mwl8k: prevent module unload hang

We need to unregister our ieee80211_hw before resetting the chip, as
the former causes firmware commands to be issued which will time out
once the chip has been reset.
Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
Acked-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwl8k.c

@@ -3733,6 +3733,8 @@ static void __devexit mwl8k_remove(struct pci_dev *pdev)
 
 	ieee80211_stop_queues(hw);
 
+	ieee80211_unregister_hw(hw);
+
 	/* Remove tx reclaim tasklet */
 	tasklet_kill(&priv->tx_reclaim_task);
 
@@ -3746,8 +3748,6 @@ static void __devexit mwl8k_remove(struct pci_dev *pdev)
 	for (i = 0; i < MWL8K_TX_QUEUES; i++)
 		mwl8k_txq_reclaim(hw, i, 1);
 
-	ieee80211_unregister_hw(hw);
-
 	for (i = 0; i < MWL8K_TX_QUEUES; i++)
 		mwl8k_txq_deinit(hw, i);