[PATCH] rt2x00: Reorganize rt2x00dev->flags

The rt2x00dev->flags has become a chaos over time,
this will reorganize the flags by renaming, deleting, adding
and properly implement the flags.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 38 insertions, 17 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index 17802f6d3d6d..e98d013a189f 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -82,6 +82,17 @@ int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
         u16 frame_control;
 
         /*
+         * Mac80211 might be calling this function while we are trying
+         * to remove the device or perhaps suspending it.
+         * Note that we can only stop the TX queues inside the TX path
+         * due to possible race conditions in mac80211.
+         */
+        if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags)) {
+                ieee80211_stop_queues(hw);
+                return 0;
+        }
+
+        /*
          * Determine which ring to put packet on.
          */
         ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
@@ -126,14 +137,15 @@ int rt2x00mac_start(struct ieee80211_hw *hw)
         struct rt2x00_dev *rt2x00dev = hw->priv;
         int status;
 
-        if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+        if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) ||
+            test_bit(DEVICE_STARTED, &rt2x00dev->flags))
                 return 0;
 
         /*
          * If this is the first interface which is added,
          * we should load the firmware now.
          */
-        if (test_bit(REQUIRE_FIRMWARE, &rt2x00dev->flags)) {
+        if (test_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags)) {
                 status = rt2x00lib_load_firmware(rt2x00dev);
                 if (status)
                         return status;
@@ -155,6 +167,8 @@ int rt2x00mac_start(struct ieee80211_hw *hw)
                 return status;
         }
 
+        __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
+
         return 0;
 }
 EXPORT_SYMBOL_GPL(rt2x00mac_start);
@@ -163,11 +177,16 @@ void rt2x00mac_stop(struct ieee80211_hw *hw)
 {
         struct rt2x00_dev *rt2x00dev = hw->priv;
 
+        if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
+                return;
+
         /*
          * Perhaps we can add something smarter here,
          * but for now just disabling the radio should do.
          */
         rt2x00lib_disable_radio(rt2x00dev);
+
+        __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
 }
 EXPORT_SYMBOL_GPL(rt2x00mac_stop);
 
@@ -178,9 +197,12 @@ int rt2x00mac_add_interface(struct ieee80211_hw *hw,
         struct interface *intf = &rt2x00dev->interface;
 
         /*
-         * We only support 1 non-monitor interface.
+         * Don't allow interfaces to be added while
+         * either the device has disappeared or when
+         * another interface is already present.
          */
-        if (is_interface_present(intf))
+        if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) ||
+            is_interface_present(intf))
                 return -ENOBUFS;
 
         intf->id = conf->if_id;
@@ -208,9 +230,12 @@ void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
         struct interface *intf = &rt2x00dev->interface;
 
         /*
-         * We only support 1 non-monitor interface.
+         * Don't allow interfaces to be remove while
+         * either the device has disappeared or when
+         * no interface is present.
          */
-        if (!is_interface_present(intf))
+        if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags) ||
+            !is_interface_present(intf))
                 return;
 
         intf->id = 0;
@@ -233,12 +258,10 @@ 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.
+         * 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))
+        if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
                 return 0;
 
         /*
@@ -252,7 +275,7 @@ int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
                         rt2x00lib_toggle_rx(rt2x00dev, 0);
         }
 
-        rt2x00lib_config(rt2x00dev, conf);
+        rt2x00lib_config(rt2x00dev, conf, 0);
 
         /*
          * Reenable RX only if the radio should be on.
@@ -274,12 +297,10 @@ 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.
+         * 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))
+        if (!test_bit(DEVICE_PRESENT, &rt2x00dev->flags))
                 return 0;
 
         /*