[PATCH] p54: only unregister ieee80211_hw when it has been registered

[Christian Lamparter <chunkeey@googlemail.com>]

p54_unregister_common may now be called by the backend
driver's remove routine, even if the ieee80211_hw device
struct was never successfully registered.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
---
 drivers/net/wireless/p54/main.c |   13 ++++++++++---
 drivers/net/wireless/p54/p54.h  |    1 +
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c
index 40f4eb7..9c2d3d1 100644
--- a/drivers/net/wireless/p54/main.c
+++ b/drivers/net/wireless/p54/main.c
@@ -793,16 +793,19 @@ int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
 	err = ieee80211_register_hw(dev);
 	if (err) {
 		dev_err(pdev, "Cannot register device (%d).\n", err);
		return err;
 	}
+	priv->registered = true;
 
 #ifdef CONFIG_P54_LEDS
 	err = p54_init_leds(priv);
-	if (err)
+	if (err) {
+		p54_unregister_common(dev);
 		return err;
+	}
 #endif /* CONFIG_P54_LEDS */
 
 	dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
 	return 0;
 }
 EXPORT_SYMBOL_GPL(p54_register_common);
@@ -839,7 +843,11 @@ void p54_unregister_common(struct ieee80211_hw *dev)
 	p54_unregister_leds(priv);
 #endif /* CONFIG_P54_LEDS */
 
-	ieee80211_unregister_hw(dev);
+	if (priv->registered) {
+		priv->registered = false;
+		ieee80211_unregister_hw(dev);
+	}
+
 	mutex_destroy(&priv->conf_mutex);
 	mutex_destroy(&priv->eeprom_mutex);
 }
diff --git a/drivers/net/wireless/p54/p54.h b/drivers/net/wireless/p54/p54.h
index 452fa3a..40b401e 100644
--- a/drivers/net/wireless/p54/p54.h
+++ b/drivers/net/wireless/p54/p54.h
@@ -173,6 +173,7 @@ struct p54_common {
 	struct sk_buff_head tx_pending;
 	struct sk_buff_head tx_queue;
 	struct mutex conf_mutex;
+	bool registered;
 
 	/* memory management (as seen by the firmware) */
 	u32 rx_start;
-- 
1.7.9.1