wl1271: Added alloc and free hw functions

Moved allocation and freeing of context structure of the driver to
separate functions from probe and remove 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: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271_main.c

@@ -2025,23 +2025,17 @@ static struct platform_device wl1271_device = {
 };
 
 #define WL1271_DEFAULT_CHANNEL 0
-static int __devinit wl1271_probe(struct spi_device *spi)
+
+static struct ieee80211_hw *wl1271_alloc_hw(void)
 {
-	struct wl12xx_platform_data *pdata;
 	struct ieee80211_hw *hw;
 	struct wl1271 *wl;
-	int ret, i;
-
-	pdata = spi->dev.platform_data;
-	if (!pdata) {
-		wl1271_error("no platform data");
-		return -ENODEV;
-	}
+	int i;
 
 	hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
 	if (!hw) {
 		wl1271_error("could not alloc ieee80211_hw");
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 	}
 
 	wl = hw->priv;
@@ -2050,8 +2044,6 @@ static int __devinit wl1271_probe(struct spi_device *spi)
 	INIT_LIST_HEAD(&wl->list);
 
 	wl->hw = hw;
-	dev_set_drvdata(&spi->dev, wl);
-	wl->spi = spi;
 
 	skb_queue_head_init(&wl->tx_queue);
 
@@ -2078,6 +2070,54 @@ static int __devinit wl1271_probe(struct spi_device *spi)
 	wl->state = WL1271_STATE_OFF;
 	mutex_init(&wl->mutex);
 
+	/* Apply default driver configuration. */
+	wl1271_conf_init(wl);
+
+	return hw;
+}
+
+int wl1271_free_hw(struct wl1271 *wl)
+{
+	ieee80211_unregister_hw(wl->hw);
+
+	wl1271_debugfs_exit(wl);
+
+	kfree(wl->target_mem_map);
+	vfree(wl->fw);
+	wl->fw = NULL;
+	kfree(wl->nvs);
+	wl->nvs = NULL;
+
+	kfree(wl->fw_status);
+	kfree(wl->tx_res_if);
+
+	ieee80211_free_hw(wl->hw);
+
+	return 0;
+}
+
+static int __devinit wl1271_probe(struct spi_device *spi)
+{
+	struct wl12xx_platform_data *pdata;
+	struct ieee80211_hw *hw;
+	struct wl1271 *wl;
+	int ret;
+
+	pdata = spi->dev.platform_data;
+	if (!pdata) {
+		wl1271_error("no platform data");
+		return -ENODEV;
+	}
+
+	hw = wl1271_alloc_hw();
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
+
+	wl = hw->priv;
+
+	dev_set_drvdata(&spi->dev, wl);
+	wl->spi = spi;
+
 	/* This is the only SPI value that we need to set here, the rest
 	 * comes from the board-peripherals file */
 	spi->bits_per_word = 32;
@@ -2119,9 +2159,6 @@ static int __devinit wl1271_probe(struct spi_device *spi)
 	}
 	dev_set_drvdata(&wl1271_device.dev, wl);
 
-	/* Apply default driver configuration. */
-	wl1271_conf_init(wl);
-
 	ret = wl1271_init_ieee80211(wl);
 	if (ret)
 		goto out_platform;
@@ -2152,21 +2189,10 @@ static int __devexit wl1271_remove(struct spi_device *spi)
 {
 	struct wl1271 *wl = dev_get_drvdata(&spi->dev);
 
-	ieee80211_unregister_hw(wl->hw);
-
-	wl1271_debugfs_exit(wl);
 	platform_device_unregister(&wl1271_device);
 	free_irq(wl->irq, wl);
-	kfree(wl->target_mem_map);
-	vfree(wl->fw);
-	wl->fw = NULL;
-	kfree(wl->nvs);
-	wl->nvs = NULL;
 
-	kfree(wl->fw_status);
-	kfree(wl->tx_res_if);
-
-	ieee80211_free_hw(wl->hw);
+	wl1271_free_hw(wl);
 
 	return 0;
 }