rt2x00: Don't alter rt2x00dev->default_ant

rt2x00dev->default_ant should be initialized once by the driver,
and should not be changed afterwards. Because rt2x00lib_config_antenna()
was using a reference to the struct antenna_setup it actually had the oppurtunity
to change the default antenna setting and it actually did that during the validation.

Instead of passing a pointer to antenna_setup the entire structure should be copied.

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

4 files changed, 10 insertions, 10 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index c6e0bcf78e9e..3845316ccd39 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -124,7 +124,7 @@ enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant,
 }
 
 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
-                              struct antenna_setup *ant)
+                              struct antenna_setup ant)
 {
         struct antenna_setup *def = &rt2x00dev->default_ant;
         struct antenna_setup *active = &rt2x00dev->link.ant.active;
@@ -138,10 +138,10 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
          * might have caused that we restore back to the already
          * active setting. If that has happened we can quit.
          */
-        ant->rx = rt2x00lib_config_antenna_check(ant->rx, def->rx);
-        ant->tx = rt2x00lib_config_antenna_check(ant->tx, def->tx);
+        ant.rx = rt2x00lib_config_antenna_check(ant.rx, def->rx);
+        ant.tx = rt2x00lib_config_antenna_check(ant.tx, def->tx);
 
-        if (ant->rx == active->rx && ant->tx == active->tx)
+        if (ant.rx == active->rx && ant.tx == active->tx)
                 return;
 
         /*
@@ -156,11 +156,11 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
          * The latter is required since we need to recalibrate the
          * noise-sensitivity ratio for the new setup.
          */
-        rt2x00dev->ops->lib->config_ant(rt2x00dev, ant);
+        rt2x00dev->ops->lib->config_ant(rt2x00dev, &ant);
 
         rt2x00link_reset_tuner(rt2x00dev, true);
 
-        memcpy(active, ant, sizeof(*ant));
+        memcpy(active, &ant, sizeof(ant));
 
         if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
                 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h
index 512fa2bc3a10..eeb2881e818e 100644
--- a/drivers/net/wireless/rt2x00/rt2x00lib.h
+++ b/drivers/net/wireless/rt2x00/rt2x00lib.h
@@ -88,7 +88,7 @@ void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
                           struct rt2x00_intf *intf,
                           struct ieee80211_bss_conf *conf);
 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
-                              struct antenna_setup *ant);
+                              struct antenna_setup ant);
 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
                       struct ieee80211_conf *conf,
                       const unsigned int changed_flags);
diff --git a/drivers/net/wireless/rt2x00/rt2x00link.c b/drivers/net/wireless/rt2x00/rt2x00link.c
index 32570758e67c..79915687e744 100644
--- a/drivers/net/wireless/rt2x00/rt2x00link.c
+++ b/drivers/net/wireless/rt2x00/rt2x00link.c
@@ -173,7 +173,7 @@ static void rt2x00lib_antenna_diversity_sample(struct rt2x00_dev *rt2x00dev)
         if (ant->flags & ANTENNA_TX_DIVERSITY)
                 new_ant.tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 
-        rt2x00lib_config_antenna(rt2x00dev, &new_ant);
+        rt2x00lib_config_antenna(rt2x00dev, new_ant);
 }
 
 static void rt2x00lib_antenna_diversity_eval(struct rt2x00_dev *rt2x00dev)
@@ -213,7 +213,7 @@ static void rt2x00lib_antenna_diversity_eval(struct rt2x00_dev *rt2x00dev)
         if (ant->flags & ANTENNA_TX_DIVERSITY)
                 new_ant.tx = (new_ant.tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
 
-        rt2x00lib_config_antenna(rt2x00dev, &new_ant);
+        rt2x00lib_config_antenna(rt2x00dev, new_ant);
 }
 
 static void rt2x00lib_antenna_diversity(struct rt2x00_dev *rt2x00dev)
diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index 9d31c23b92fa..7de1a2cdcf8c 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -378,7 +378,7 @@ int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed)
                  */
                 if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED)
                         rt2x00lib_config_antenna(rt2x00dev,
-                                                 &rt2x00dev->default_ant);
+                                                 rt2x00dev->default_ant);
 
                 /* Turn RX back on */
                 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);