wl1271: Changed platform_device to be dynamically allocated

Changed platform_device to be allocated dynamically from the
wl1271_alloc_hw function. Also cleaned up error handling in the
wl1271_alloc_hw function and module probe functions.

Signed-off-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 39 insertions, 11 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271.h b/drivers/net/wireless/wl12xx/wl1271.h
index a0262b7723c3..8f11506f8310 100644
--- a/drivers/net/wireless/wl12xx/wl1271.h
+++ b/drivers/net/wireless/wl12xx/wl1271.h
@@ -353,6 +353,7 @@ struct wl1271_if_operations {
 };
 
 struct wl1271 {
+        struct platform_device *plat_dev;
         struct ieee80211_hw *hw;
         bool mac80211_registered;
 
diff --git a/drivers/net/wireless/wl12xx/wl1271_io.h b/drivers/net/wireless/wl12xx/wl1271_io.h
index 3ff88d971308..d8837ef0bb40 100644
--- a/drivers/net/wireless/wl12xx/wl1271_io.h
+++ b/drivers/net/wireless/wl12xx/wl1271_io.h
@@ -161,6 +161,7 @@ int wl1271_set_partition(struct wl1271 *wl,
 /* Functions from wl1271_main.c */
 
 int wl1271_register_hw(struct wl1271 *wl);
+void wl1271_unregister_hw(struct wl1271 *wl);
 int wl1271_init_ieee80211(struct wl1271 *wl);
 struct ieee80211_hw *wl1271_alloc_hw(void);
 int wl1271_free_hw(struct wl1271 *wl);
diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c
index 0bebc456ec0d..3daba6c0c77f 100644
--- a/drivers/net/wireless/wl12xx/wl1271_main.c
+++ b/drivers/net/wireless/wl12xx/wl1271_main.c
@@ -2008,6 +2008,14 @@ int wl1271_register_hw(struct wl1271 *wl)
 }
 EXPORT_SYMBOL_GPL(wl1271_register_hw);
 
+void wl1271_unregister_hw(struct wl1271 *wl)
+{
+        ieee80211_unregister_hw(wl->hw);
+        wl->mac80211_registered = false;
+
+}
+EXPORT_SYMBOL_GPL(wl1271_unregister_hw);
+
 int wl1271_init_ieee80211(struct wl1271 *wl)
 {
         /* The tx descriptor buffer and the TKIP space. */
@@ -2046,6 +2054,7 @@ EXPORT_SYMBOL_GPL(wl1271_init_ieee80211);
 struct ieee80211_hw *wl1271_alloc_hw(void)
 {
         struct ieee80211_hw *hw;
+        struct platform_device *plat_dev = NULL;
         struct wl1271 *wl;
         int i, ret;
         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
@@ -2054,15 +2063,25 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
         if (!hw) {
                 wl1271_error("could not alloc ieee80211_hw");
                 ret = -ENOMEM;
-                goto err;
+                goto err_hw_alloc;
+        }
+
+        plat_dev = kmalloc(sizeof(wl1271_device), GFP_KERNEL);
+        if (!plat_dev) {
+                wl1271_error("could not allocate platform_device");
+                ret = -ENOMEM;
+                goto err_plat_alloc;
         }
 
+        memcpy(plat_dev, &wl1271_device, sizeof(wl1271_device));
+
         wl = hw->priv;
         memset(wl, 0, sizeof(*wl));
 
         INIT_LIST_HEAD(&wl->list);
 
         wl->hw = hw;
+        wl->plat_dev = plat_dev;
 
         skb_queue_head_init(&wl->tx_queue);
 
@@ -2103,15 +2122,15 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
         wl1271_debugfs_init(wl);
 
         /* Register platform device */
-        ret = platform_device_register(&wl1271_device);
+        ret = platform_device_register(wl->plat_dev);
         if (ret) {
                 wl1271_error("couldn't register platform device");
                 goto err_hw;
         }
-        dev_set_drvdata(&wl1271_device.dev, wl);
+        dev_set_drvdata(&wl->plat_dev->dev, wl);
 
         /* Create sysfs file to control bt coex state */
-        ret = device_create_file(&wl1271_device.dev, &dev_attr_bt_coex_state);
+        ret = device_create_file(&wl->plat_dev->dev, &dev_attr_bt_coex_state);
         if (ret < 0) {
                 wl1271_error("failed to create sysfs file bt_coex_state");
                 goto err_platform;
@@ -2120,20 +2139,25 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
         return hw;
 
 err_platform:
-        platform_device_unregister(&wl1271_device);
+        platform_device_unregister(wl->plat_dev);
 
 err_hw:
-        ieee80211_unregister_hw(wl->hw);
+        wl1271_debugfs_exit(wl);
+        kfree(plat_dev);
+
+err_plat_alloc:
+        ieee80211_free_hw(hw);
+
+err_hw_alloc:
 
-err:
         return ERR_PTR(ret);
 }
 EXPORT_SYMBOL_GPL(wl1271_alloc_hw);
 
 int wl1271_free_hw(struct wl1271 *wl)
 {
-        platform_device_unregister(&wl1271_device);
-        ieee80211_unregister_hw(wl->hw);
+        platform_device_unregister(wl->plat_dev);
+        kfree(wl->plat_dev);
 
         wl1271_debugfs_exit(wl);
 
diff --git a/drivers/net/wireless/wl12xx/wl1271_sdio.c b/drivers/net/wireless/wl12xx/wl1271_sdio.c
index 99b5b3f7a92c..3c03de74dbfc 100644
--- a/drivers/net/wireless/wl12xx/wl1271_sdio.c
+++ b/drivers/net/wireless/wl12xx/wl1271_sdio.c
@@ -239,7 +239,7 @@ static int __devinit wl1271_probe(struct sdio_func *func,
 
 
  out_free:
-        ieee80211_free_hw(hw);
+        wl1271_free_hw(wl);
 
         return ret;
 }
@@ -250,6 +250,7 @@ static void __devexit wl1271_remove(struct sdio_func *func)
 
         free_irq(wl->irq, wl);
 
+        wl1271_unregister_hw(wl);
         wl1271_free_hw(wl);
 }
 
diff --git a/drivers/net/wireless/wl12xx/wl1271_spi.c b/drivers/net/wireless/wl12xx/wl1271_spi.c
index 4c129c76c29d..f44b05a32b0d 100644
--- a/drivers/net/wireless/wl12xx/wl1271_spi.c
+++ b/drivers/net/wireless/wl12xx/wl1271_spi.c
@@ -422,7 +422,7 @@ static int __devinit wl1271_probe(struct spi_device *spi)
         free_irq(wl->irq, wl);
 
  out_free:
-        ieee80211_free_hw(hw);
+        wl1271_free_hw(wl);
 
         return ret;
 }
@@ -433,6 +433,7 @@ static int __devexit wl1271_remove(struct spi_device *spi)
 
         free_irq(wl->irq, wl);
 
+        wl1271_unregister_hw(wl);
         wl1271_free_hw(wl);
 
         return 0;