cfg80211/mac80211: Update set_tx_power to use mBm instead of dBm units

In preparation for a TX power setting interface in the nl80211, change the
.set_tx_power function to use mBm units instead of dBm for greater accuracy and
smaller power levels.

Also, already in advance move the tx_power_setting enumeration to nl80211.

This change affects the .tx_set_power function prototype. As a result, the
corresponding changes are needed to modules using it. These are mac80211,
iwmc3200wifi and rndis_wlan.

Cc: Samuel Ortiz <samuel.ortiz@intel.com>
Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Acked-by: Samuel Ortiz <samuel.ortiz@intel.com>
Acked-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 13 insertions, 7 deletions

diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c
index 4102cca54882..5e26edb57d82 100644
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -520,8 +520,9 @@ static int rndis_scan(struct wiphy *wiphy, struct net_device *dev,
 
 static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed);
 
-static int rndis_set_tx_power(struct wiphy *wiphy, enum tx_power_setting type,
-                                int dbm);
+static int rndis_set_tx_power(struct wiphy *wiphy,
+                              enum nl80211_tx_power_setting type,
+                              int mbm);
 static int rndis_get_tx_power(struct wiphy *wiphy, int *dbm);
 
 static int rndis_connect(struct wiphy *wiphy, struct net_device *dev,
@@ -1856,20 +1857,25 @@ static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed)
         return 0;
 }
 
-static int rndis_set_tx_power(struct wiphy *wiphy, enum tx_power_setting type,
-                                int dbm)
+static int rndis_set_tx_power(struct wiphy *wiphy,
+                              enum nl80211_tx_power_setting type,
+                              int mbm)
 {
         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
         struct usbnet *usbdev = priv->usbdev;
 
-        netdev_dbg(usbdev->net, "%s(): type:0x%x dbm:%i\n",
-                   __func__, type, dbm);
+        netdev_dbg(usbdev->net, "%s(): type:0x%x mbm:%i\n",
+                   __func__, type, mbm);
+
+        if (mbm < 0 || (mbm % 100))
+                return -ENOTSUPP;
 
         /* Device doesn't support changing txpower after initialization, only
          * turn off/on radio. Support 'auto' mode and setting same dBm that is
          * currently used.
          */
-        if (type == TX_POWER_AUTOMATIC || dbm == get_bcm4320_power_dbm(priv)) {
+        if (type == NL80211_TX_POWER_AUTOMATIC ||
+            MBM_TO_DBM(mbm) == get_bcm4320_power_dbm(priv)) {
                 if (!priv->radio_on)
                         disassociate(usbdev, true); /* turn on radio */