[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: Jouni Malinen <jkmaline@cc.hut.fi>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

5 files changed, 10 insertions, 47 deletions

diff --git a/drivers/net/wireless/hostap/hostap.c b/drivers/net/wireless/hostap/hostap.c
index e7f5821b4942..6a96cd9f2685 100644
--- a/drivers/net/wireless/hostap/hostap.c
+++ b/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++;
diff --git a/drivers/net/wireless/hostap/hostap_cs.c b/drivers/net/wireless/hostap/hostap_cs.c
index faa83badf0a1..23bcc51b7131 100644
--- a/drivers/net/wireless/hostap/hostap_cs.c
+++ b/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);
                         }
diff --git a/drivers/net/wireless/hostap/hostap_pci.c b/drivers/net/wireless/hostap/hostap_pci.c
index b9254f73fbaf..594cc29c6175 100644
--- a/drivers/net/wireless/hostap/hostap_pci.c
+++ b/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,
 };
diff --git a/drivers/net/wireless/hostap/hostap_plx.c b/drivers/net/wireless/hostap/hostap_plx.c
index 1abebdf48b20..85d3f8a29539 100644
--- a/drivers/net/wireless/hostap/hostap_plx.c
+++ b/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,
 };
diff --git a/drivers/net/wireless/hostap/hostap_wlan.h b/drivers/net/wireless/hostap/hostap_wlan.h
index cc061e1560d3..cfd801559492 100644
--- a/drivers/net/wireless/hostap/hostap_wlan.h
+++ b/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