From 28e8004af2118dcca493dfff4c0aa0d80f8b5b1d Mon Sep 17 00:00:00 2001
From: Stanislaw Gruszka <sgruszka@redhat.com>
Date: Fri, 5 Oct 2012 13:44:14 +0200
Subject: [PATCH] --- yaml --- r: 340909 b: refs/heads/master c:
 1e4cf249a43da5c441c1025aca588ca65185fb61 h: refs/heads/master i:   340907:
 96b50cafe0102beb4c3ec8a1754b8f234cf72eaa v: v3

---
 [refs]                                        |  2 +-
 trunk/drivers/net/wireless/rt2x00/rt2800lib.c | 27 +++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 01890006c655..4475bf280d02 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 146c3b0ccd09dbd21f7dd6c9ed10094cb91f9a2d
+refs/heads/master: 1e4cf249a43da5c441c1025aca588ca65185fb61
diff --git a/trunk/drivers/net/wireless/rt2x00/rt2800lib.c b/trunk/drivers/net/wireless/rt2x00/rt2800lib.c
index 7110e1f1e49a..3e059b6c484d 100644
--- a/trunk/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/trunk/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -2520,6 +2520,27 @@ static int rt2800_get_txpower_bw_comp(struct rt2x00_dev *rt2x00dev,
 	return comp_value;
 }
 
+static int rt2800_get_txpower_reg_delta(struct rt2x00_dev *rt2x00dev,
+					int power_level, int max_power)
+{
+	int delta;
+
+	if (test_bit(CAPABILITY_POWER_LIMIT, &rt2x00dev->cap_flags))
+		return 0;
+
+	/*
+	 * XXX: We don't know the maximum transmit power of our hardware since
+	 * the EEPROM doesn't expose it. We only know that we are calibrated
+	 * to 100% tx power.
+	 *
+	 * Hence, we assume the regulatory limit that cfg80211 calulated for
+	 * the current channel is our maximum and if we are requested to lower
+	 * the value we just reduce our tx power accordingly.
+	 */
+	delta = power_level - max_power;
+	return min(delta, 0);
+}
+
 static u8 rt2800_compensate_txpower(struct rt2x00_dev *rt2x00dev, int is_rate_b,
 				   enum ieee80211_band band, int power_level,
 				   u8 txpower, int delta)
@@ -2585,6 +2606,12 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev,
 	 */
 	delta += rt2800_get_gain_calibration_delta(rt2x00dev);
 
+	/*
+	 * Apply regulatory delta.
+	 */
+	delta += rt2800_get_txpower_reg_delta(rt2x00dev, power_level,
+					      chan->max_power);
+
 	/*
 	 * BBP_R1 controls TX power for all rates, it allow to set the following
 	 * gains -12, -6, 0, +6 dBm by setting values 2, 1, 0, 3 respectively.