[PATCH 4/24] rt2x00: Don't allow configuration calls when uninitialized

[Ivo van Doorn <ivdoorn@gmail.com>]

When a device is being hot-unplugged or during suspend/resume
rt2x00 is not able to handle configuration calls from mac80211.
Check for the DEVICE_INITIALIZED flag to determine if a
configuration call from mac80211 is welcome or not.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
---
 drivers/net/wireless/rt2x00/rt2x00mac.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index f25cf38..0001b79 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -245,6 +245,15 @@ int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
 	struct rt2x00_dev *rt2x00dev = hw->priv;
 
 	/*
+	 * If the device is not initialized we shouldn't accept
+	 * any configuration changes. Mac80211 might be calling
+	 * this function while we are trying to remove the device
+	 * or perhaps suspending it.
+	 */
+	if (!test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+		return 0;
+
+	/*
 	 * Check if we need to disable the radio,
 	 * if this is not the case, at least the RX must be disabled.
 	 */
@@ -285,6 +294,15 @@ int rt2x00mac_config_interface(struct ieee80211_hw *hw, int if_id,
 	int status;
 
 	/*
+	 * If the device is not initialized we shouldn't accept
+	 * any configuration changes. Mac80211 might be calling
+	 * this function while we are trying to remove the device
+	 * or perhaps suspending it.
+	 */
+	if (!test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+		return 0;
+
+	/*
 	 * Monitor mode does not need configuring.
 	 * If the given type does not match the configured type,
 	 * there has been a problem.
-- 
1.5.3