From: Ivo van Doorn <ivdoorn@gmail.com>
Date: Mon, 25 Feb 2008 22:15:08 +0000 (+0100)
Subject: rt2x00: Don't switch to antenna with low rssi
X-Git-Tag: v2.6.25-rc4~148^2~27^2~6
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=05253c93feb40901d80a0d6f239a0bc78860c679;p=linux-2.6

rt2x00: Don't switch to antenna with low rssi

When rssi_a > rssi_b is true and the current antenna
was already antenna A, then rt2x00 incorrectly jumped
to antenna B.

Also don't configure the antenna when there has been
no change in the antenna setup.

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

diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index 0d57d7f678..07adc576db 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -97,6 +97,10 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 	libconf.ant.rx = rx;
 	libconf.ant.tx = tx;
 
+	if (rx == rt2x00dev->link.ant.active.rx &&
+	    tx == rt2x00dev->link.ant.active.tx)
+		return;
+
 	/*
 	 * Antenna setup changes require the RX to be disabled,
 	 * else the changes will be ignored by the device.
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 00f5f0d49e..7294c75272 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -260,19 +260,11 @@ static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
 	if (sample_a == sample_b)
 		return;
 
-	if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) {
-		if (sample_a > sample_b && rx == ANTENNA_B)
-			rx = ANTENNA_A;
-		else if (rx == ANTENNA_A)
-			rx = ANTENNA_B;
-	}
+	if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
+		rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 
-	if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY) {
-		if (sample_a > sample_b && tx == ANTENNA_B)
-			tx = ANTENNA_A;
-		else if (tx == ANTENNA_A)
-			tx = ANTENNA_B;
-	}
+	if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
+		tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
 
 	rt2x00lib_config_antenna(rt2x00dev, rx, tx);
 }
@@ -327,7 +319,7 @@ static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
 
 	if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
 	    !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
-		rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
+		rt2x00dev->link.ant.flags = 0;
 		return;
 	}