[PATCH] hostap: Remove hw specific dev_open/close handlers

Host AP driver used hardware model specific dev_open/close handlers
that were called on dev_open/close if the hardware driver had
registered the handler. These were only used for hostap_cs and only
for tracking whether any of the netdevs were UP. This information is
already available from local->num_dev_open, so there is not need for
the special open/close handler.

Let's get rid of these handlers. In addition to cleaning up the code,
this fixes a module refcounting issue for hostap_cs where ejecting the
card while any of the netdevs were open did not decrement refcount
properly.
Signed-off-by: NJouni Malinen <jkmaline@cc.hut.fi>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

drivers/net/wireless/hostap/hostap.c

@@ -716,9 +716,6 @@ static int prism2_close(struct net_device *dev)
 		hostap_deauth_all_stas(dev, local->ap, 1);
 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 
-	if (local->func->dev_close && local->func->dev_close(local))
-		return 0;
-
 	if (dev == local->dev) {
 		local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
 	}
@@ -766,9 +763,6 @@ static int prism2_open(struct net_device *dev)
 	    local->hw_downloading)
 		return -ENODEV;
 
-	if (local->func->dev_open && local->func->dev_open(local))
-		return 1;
-
 	if (!try_module_get(local->hw_module))
 		return -ENODEV;
 	local->num_dev_open++;

drivers/net/wireless/hostap/hostap_cs.c

@@ -492,42 +492,10 @@ static void prism2_pccard_genesis_reset(local_info_t *local, int hcr)
 }
 
 
-static int prism2_pccard_dev_open(local_info_t *local)
-{
-	struct hostap_cs_priv *hw_priv = local->hw_priv;
-	hw_priv->link->open++;
-	return 0;
-}
-
-
-static int prism2_pccard_dev_close(local_info_t *local)
-{
-	struct hostap_cs_priv *hw_priv;
-
-	if (local == NULL || local->hw_priv == NULL)
-		return 1;
-	hw_priv = local->hw_priv;
-	if (hw_priv->link == NULL)
-		return 1;
-
-	if (!hw_priv->link->open) {
-		printk(KERN_WARNING "%s: prism2_pccard_dev_close(): "
-		       "link not open?!\n", local->dev->name);
-		return 1;
-	}
-
-	hw_priv->link->open--;
-
-	return 0;
-}
-
-
 static struct prism2_helper_functions prism2_pccard_funcs =
 {
 	.card_present	= prism2_pccard_card_present,
 	.cor_sreset	= prism2_pccard_cor_sreset,
-	.dev_open	= prism2_pccard_dev_open,
-	.dev_close	= prism2_pccard_dev_close,
 	.genesis_reset	= prism2_pccard_genesis_reset,
 	.hw_type	= HOSTAP_HW_PCCARD,
 };
@@ -883,6 +851,13 @@ static int prism2_event(event_t event, int priority,
 {
 	dev_link_t *link = args->client_data;
 	struct net_device *dev = (struct net_device *) link->priv;
+	int dev_open = 0;
+
+	if (link->state & DEV_CONFIG) {
+		struct hostap_interface *iface = netdev_priv(dev);
+		if (iface && iface->local)
+			dev_open = iface->local->num_dev_open > 0;
+	}
 
 	switch (event) {
 	case CS_EVENT_CARD_INSERTION:
@@ -911,7 +886,7 @@ static int prism2_event(event_t event, int priority,
 	case CS_EVENT_RESET_PHYSICAL:
 		PDEBUG(DEBUG_EXTRA, "%s: CS_EVENT_RESET_PHYSICAL\n", dev_info);
 		if (link->state & DEV_CONFIG) {
-			if (link->open) {
+			if (dev_open) {
 				netif_stop_queue(dev);
 				netif_device_detach(dev);
 			}
@@ -931,8 +906,8 @@ static int prism2_event(event_t event, int priority,
 			pcmcia_request_configuration(link->handle,
 						     &link->conf);
 			prism2_hw_shutdown(dev, 1);
-			prism2_hw_config(dev, link->open ? 0 : 1);
-			if (link->open) {
+			prism2_hw_config(dev, dev_open ? 0 : 1);
+			if (dev_open) {
 				netif_device_attach(dev);
 				netif_start_queue(dev);
 			}

drivers/net/wireless/hostap/hostap_pci.c

@@ -277,8 +277,6 @@ static struct prism2_helper_functions prism2_pci_funcs =
 {
 	.card_present	= NULL,
 	.cor_sreset	= prism2_pci_cor_sreset,
-	.dev_open	= NULL,
-	.dev_close	= NULL,
 	.genesis_reset	= prism2_pci_genesis_reset,
 	.hw_type	= HOSTAP_HW_PCI,
 };

drivers/net/wireless/hostap/hostap_plx.c

@@ -328,8 +328,6 @@ static struct prism2_helper_functions prism2_plx_funcs =
 {
 	.card_present	= NULL,
 	.cor_sreset	= prism2_plx_cor_sreset,
-	.dev_open	= NULL,
-	.dev_close	= NULL,
 	.genesis_reset	= prism2_plx_genesis_reset,
 	.hw_type	= HOSTAP_HW_PLX,
 };

drivers/net/wireless/hostap/hostap_wlan.h

@@ -552,8 +552,6 @@ struct prism2_helper_functions {
 	 * (hostap_{cs,plx,pci}.c */
 	int (*card_present)(local_info_t *local);
 	void (*cor_sreset)(local_info_t *local);
-	int (*dev_open)(local_info_t *local);
-	int (*dev_close)(local_info_t *local);
 	void (*genesis_reset)(local_info_t *local, int hcr);
 
 	/* the following functions are from hostap_hw.c, but they may have some