diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c
index bfab5a165b7633452860a38f66a326072d78f616..31c1dd271627191813d37278d23abc08bcb48455 100644
--- a/drivers/net/wireless/rt2x00/rt2400pci.c
+++ b/drivers/net/wireless/rt2x00/rt2400pci.c
@@ -291,90 +291,67 @@ static void rt2400pci_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 	rt2x00pci_register_write(rt2x00dev, CSR14, reg);
 }
 
-static void rt2400pci_config_rate(struct rt2x00_dev *rt2x00dev, const int rate)
+static void rt2400pci_config_preamble(struct rt2x00_dev *rt2x00dev,
+				      const int short_preamble,
+				      const int ack_timeout,
+				      const int ack_consume_time)
 {
-	struct ieee80211_conf *conf = &rt2x00dev->hw->conf;
+	int preamble_mask;
 	u32 reg;
-	u32 preamble;
-	u16 value;
-
-	if (DEVICE_GET_RATE_FIELD(rate, PREAMBLE))
-		preamble = SHORT_PREAMBLE;
-	else
-		preamble = PREAMBLE;
 
-	reg = DEVICE_GET_RATE_FIELD(rate, RATEMASK) & DEV_BASIC_RATEMASK;
-	rt2x00pci_register_write(rt2x00dev, ARCSR1, reg);
+	/*
+	 * When short preamble is enabled, we should set bit 0x08
+	 */
+	preamble_mask = short_preamble << 3;
 
 	rt2x00pci_register_read(rt2x00dev, TXCSR1, &reg);
-	value = ((conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
-		 SHORT_DIFS : DIFS) +
-	    PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field32(&reg, TXCSR1_ACK_TIMEOUT, value);
-	value = SIFS + PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field32(&reg, TXCSR1_ACK_CONSUME_TIME, value);
+	rt2x00_set_field32(&reg, TXCSR1_ACK_TIMEOUT, ack_timeout);
+	rt2x00_set_field32(&reg, TXCSR1_ACK_CONSUME_TIME, ack_consume_time);
 	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
 
-	preamble = DEVICE_GET_RATE_FIELD(rate, PREAMBLE) ? 0x08 : 0x00;
-
 	rt2x00pci_register_read(rt2x00dev, ARCSR2, &reg);
-	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00 | preamble);
+	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR2_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10));
 	rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR3, &reg);
-	rt2x00_set_field32(&reg, ARCSR3_SIGNAL, 0x01 | preamble);
+	rt2x00_set_field32(&reg, ARCSR3_SIGNAL, 0x01 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR3_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 20));
 	rt2x00pci_register_write(rt2x00dev, ARCSR3, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR4, &reg);
-	rt2x00_set_field32(&reg, ARCSR4_SIGNAL, 0x02 | preamble);
+	rt2x00_set_field32(&reg, ARCSR4_SIGNAL, 0x02 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR4_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 55));
 	rt2x00pci_register_write(rt2x00dev, ARCSR4, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR5, &reg);
-	rt2x00_set_field32(&reg, ARCSR5_SIGNAL, 0x03 | preamble);
+	rt2x00_set_field32(&reg, ARCSR5_SIGNAL, 0x03 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR5_SERVICE, 0x84);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 110));
 	rt2x00pci_register_write(rt2x00dev, ARCSR5, reg);
 }
 
 static void rt2400pci_config_phymode(struct rt2x00_dev *rt2x00dev,
-				     const int phymode)
+				     const int basic_rate_mask)
 {
-	struct ieee80211_hw_mode *mode;
-	struct ieee80211_rate *rate;
-
-	rt2x00dev->curr_hwmode = HWMODE_B;
-
-	mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
-	rate = &mode->rates[mode->num_rates - 1];
-
-	rt2400pci_config_rate(rt2x00dev, rate->val2);
+	rt2x00pci_register_write(rt2x00dev, ARCSR1, basic_rate_mask);
 }
 
 static void rt2400pci_config_channel(struct rt2x00_dev *rt2x00dev,
-				     const int index, const int channel)
+				     struct rf_channel *rf)
 {
-	struct rf_channel reg;
-
-	/*
-	 * Fill rf_reg structure.
-	 */
-	memcpy(&reg, &rt2x00dev->spec.channels[index], sizeof(reg));
-
 	/*
 	 * Switch on tuning bits.
 	 */
-	rt2x00_set_field32(&reg.rf1, RF1_TUNER, 1);
-	rt2x00_set_field32(&reg.rf3, RF3_TUNER, 1);
+	rt2x00_set_field32(&rf->rf1, RF1_TUNER, 1);
+	rt2x00_set_field32(&rf->rf3, RF3_TUNER, 1);
 
-	rt2400pci_rf_write(rt2x00dev, 1, reg.rf1);
-	rt2400pci_rf_write(rt2x00dev, 2, reg.rf2);
-	rt2400pci_rf_write(rt2x00dev, 3, reg.rf3);
+	rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
+	rt2400pci_rf_write(rt2x00dev, 2, rf->rf2);
+	rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
 
 	/*
 	 * RF2420 chipset don't need any additional actions.
@@ -387,31 +364,31 @@ static void rt2400pci_config_channel(struct rt2x00_dev *rt2x00dev,
 	 * reference clock rate to activate auto_tune.
 	 * After that we set the value back to the correct channel.
 	 */
-	rt2400pci_rf_write(rt2x00dev, 1, reg.rf1);
+	rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
 	rt2400pci_rf_write(rt2x00dev, 2, 0x000c2a32);
-	rt2400pci_rf_write(rt2x00dev, 3, reg.rf3);
+	rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
 
 	msleep(1);
 
-	rt2400pci_rf_write(rt2x00dev, 1, reg.rf1);
-	rt2400pci_rf_write(rt2x00dev, 2, reg.rf2);
-	rt2400pci_rf_write(rt2x00dev, 3, reg.rf3);
+	rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
+	rt2400pci_rf_write(rt2x00dev, 2, rf->rf2);
+	rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
 
 	msleep(1);
 
 	/*
 	 * Switch off tuning bits.
 	 */
-	rt2x00_set_field32(&reg.rf1, RF1_TUNER, 0);
-	rt2x00_set_field32(&reg.rf3, RF3_TUNER, 0);
+	rt2x00_set_field32(&rf->rf1, RF1_TUNER, 0);
+	rt2x00_set_field32(&rf->rf3, RF3_TUNER, 0);
 
-	rt2400pci_rf_write(rt2x00dev, 1, reg.rf1);
-	rt2400pci_rf_write(rt2x00dev, 3, reg.rf3);
+	rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
+	rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
 
 	/*
 	 * Clear false CRC during channel switch.
 	 */
-	rt2x00pci_register_read(rt2x00dev, CNT0, &reg.rf1);
+	rt2x00pci_register_read(rt2x00dev, CNT0, &rf->rf1);
 }
 
 static void rt2400pci_config_txpower(struct rt2x00_dev *rt2x00dev, int txpower)
@@ -465,25 +442,22 @@ static void rt2400pci_config_antenna(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt2400pci_config_duration(struct rt2x00_dev *rt2x00dev,
-				      int short_slot_time, int beacon_int)
+				      struct rt2x00lib_conf *libconf)
 {
 	u32 reg;
 
 	rt2x00pci_register_read(rt2x00dev, CSR11, &reg);
-	rt2x00_set_field32(&reg, CSR11_SLOT_TIME,
-			   short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME);
+	rt2x00_set_field32(&reg, CSR11_SLOT_TIME, libconf->slot_time);
 	rt2x00pci_register_write(rt2x00dev, CSR11, reg);
 
 	rt2x00pci_register_read(rt2x00dev, CSR18, &reg);
-	rt2x00_set_field32(&reg, CSR18_SIFS, SIFS);
-	rt2x00_set_field32(&reg, CSR18_PIFS,
-			   short_slot_time ? SHORT_PIFS : PIFS);
+	rt2x00_set_field32(&reg, CSR18_SIFS, libconf->sifs);
+	rt2x00_set_field32(&reg, CSR18_PIFS, libconf->pifs);
 	rt2x00pci_register_write(rt2x00dev, CSR18, reg);
 
 	rt2x00pci_register_read(rt2x00dev, CSR19, &reg);
-	rt2x00_set_field32(&reg, CSR19_DIFS,
-			   short_slot_time ? SHORT_DIFS : DIFS);
-	rt2x00_set_field32(&reg, CSR19_EIFS, EIFS);
+	rt2x00_set_field32(&reg, CSR19_DIFS, libconf->difs);
+	rt2x00_set_field32(&reg, CSR19_EIFS, libconf->eifs);
 	rt2x00pci_register_write(rt2x00dev, CSR19, reg);
 
 	rt2x00pci_register_read(rt2x00dev, TXCSR1, &reg);
@@ -492,30 +466,30 @@ static void rt2400pci_config_duration(struct rt2x00_dev *rt2x00dev,
 	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
 
 	rt2x00pci_register_read(rt2x00dev, CSR12, &reg);
-	rt2x00_set_field32(&reg, CSR12_BEACON_INTERVAL, beacon_int * 16);
-	rt2x00_set_field32(&reg, CSR12_CFP_MAX_DURATION, beacon_int * 16);
+	rt2x00_set_field32(&reg, CSR12_BEACON_INTERVAL,
+			   libconf->conf->beacon_int * 16);
+	rt2x00_set_field32(&reg, CSR12_CFP_MAX_DURATION,
+			   libconf->conf->beacon_int * 16);
 	rt2x00pci_register_write(rt2x00dev, CSR12, reg);
 }
 
 static void rt2400pci_config(struct rt2x00_dev *rt2x00dev,
 			     const unsigned int flags,
-			     struct ieee80211_conf *conf)
+			     struct rt2x00lib_conf *libconf)
 {
-	int short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
-
 	if (flags & CONFIG_UPDATE_PHYMODE)
-		rt2400pci_config_phymode(rt2x00dev, conf->phymode);
+		rt2400pci_config_phymode(rt2x00dev, libconf->basic_rates);
 	if (flags & CONFIG_UPDATE_CHANNEL)
-		rt2400pci_config_channel(rt2x00dev, conf->channel_val,
-					 conf->channel);
+		rt2400pci_config_channel(rt2x00dev, &libconf->rf);
 	if (flags & CONFIG_UPDATE_TXPOWER)
-		rt2400pci_config_txpower(rt2x00dev, conf->power_level);
+		rt2400pci_config_txpower(rt2x00dev,
+					 libconf->conf->power_level);
 	if (flags & CONFIG_UPDATE_ANTENNA)
-		rt2400pci_config_antenna(rt2x00dev, conf->antenna_sel_tx,
-					 conf->antenna_sel_rx);
+		rt2400pci_config_antenna(rt2x00dev,
+					 libconf->conf->antenna_sel_tx,
+					 libconf->conf->antenna_sel_rx);
 	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
-		rt2400pci_config_duration(rt2x00dev, short_slot_time,
-					  conf->beacon_int);
+		rt2400pci_config_duration(rt2x00dev, libconf);
 }
 
 static void rt2400pci_config_cw(struct rt2x00_dev *rt2x00dev,
@@ -1609,6 +1583,7 @@ static const struct ieee80211_ops rt2400pci_mac80211_ops = {
 	.configure_filter	= rt2400pci_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
 	.set_retry_limit	= rt2400pci_set_retry_limit,
+	.erp_ie_changed		= rt2x00mac_erp_ie_changed,
 	.conf_tx		= rt2400pci_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.get_tsf		= rt2400pci_get_tsf,
@@ -1634,6 +1609,7 @@ static const struct rt2x00lib_ops rt2400pci_rt2x00_ops = {
 	.config_mac_addr	= rt2400pci_config_mac_addr,
 	.config_bssid		= rt2400pci_config_bssid,
 	.config_type		= rt2400pci_config_type,
+	.config_preamble	= rt2400pci_config_preamble,
 	.config			= rt2400pci_config,
 };
 
diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c
index c8c6a848be9729544a006d336714834f1ecd2d36..ff2d63267b19e8acb41b356e8524e3451014f291 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -295,100 +295,72 @@ static void rt2500pci_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 	rt2x00pci_register_write(rt2x00dev, CSR14, reg);
 }
 
-static void rt2500pci_config_rate(struct rt2x00_dev *rt2x00dev, const int rate)
+static void rt2500pci_config_preamble(struct rt2x00_dev *rt2x00dev,
+				      const int short_preamble,
+				      const int ack_timeout,
+				      const int ack_consume_time)
 {
-	struct ieee80211_conf *conf = &rt2x00dev->hw->conf;
+	int preamble_mask;
 	u32 reg;
-	u32 preamble;
-	u16 value;
-
-	if (DEVICE_GET_RATE_FIELD(rate, PREAMBLE))
-		preamble = SHORT_PREAMBLE;
-	else
-		preamble = PREAMBLE;
 
-	reg = DEVICE_GET_RATE_FIELD(rate, RATEMASK) & DEV_BASIC_RATEMASK;
-	rt2x00pci_register_write(rt2x00dev, ARCSR1, reg);
+	/*
+	 * When short preamble is enabled, we should set bit 0x08
+	 */
+	preamble_mask = short_preamble << 3;
 
 	rt2x00pci_register_read(rt2x00dev, TXCSR1, &reg);
-	value = ((conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
-		 SHORT_DIFS : DIFS) +
-	    PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field32(&reg, TXCSR1_ACK_TIMEOUT, value);
-	value = SIFS + PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field32(&reg, TXCSR1_ACK_CONSUME_TIME, value);
+	rt2x00_set_field32(&reg, TXCSR1_ACK_TIMEOUT, ack_timeout);
+	rt2x00_set_field32(&reg, TXCSR1_ACK_CONSUME_TIME, ack_consume_time);
 	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
 
-	preamble = DEVICE_GET_RATE_FIELD(rate, PREAMBLE) ? 0x08 : 0x00;
-
 	rt2x00pci_register_read(rt2x00dev, ARCSR2, &reg);
-	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00 | preamble);
+	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR2_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10));
 	rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR3, &reg);
-	rt2x00_set_field32(&reg, ARCSR3_SIGNAL, 0x01 | preamble);
+	rt2x00_set_field32(&reg, ARCSR3_SIGNAL, 0x01 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR3_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 20));
 	rt2x00pci_register_write(rt2x00dev, ARCSR3, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR4, &reg);
-	rt2x00_set_field32(&reg, ARCSR4_SIGNAL, 0x02 | preamble);
+	rt2x00_set_field32(&reg, ARCSR4_SIGNAL, 0x02 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR4_SERVICE, 0x04);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 55));
 	rt2x00pci_register_write(rt2x00dev, ARCSR4, reg);
 
 	rt2x00pci_register_read(rt2x00dev, ARCSR5, &reg);
-	rt2x00_set_field32(&reg, ARCSR5_SIGNAL, 0x03 | preamble);
+	rt2x00_set_field32(&reg, ARCSR5_SIGNAL, 0x03 | preamble_mask);
 	rt2x00_set_field32(&reg, ARCSR5_SERVICE, 0x84);
 	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 110));
 	rt2x00pci_register_write(rt2x00dev, ARCSR5, reg);
 }
 
 static void rt2500pci_config_phymode(struct rt2x00_dev *rt2x00dev,
-				     const int phymode)
+				     const int basic_rate_mask)
 {
-	struct ieee80211_hw_mode *mode;
-	struct ieee80211_rate *rate;
-
-	if (phymode == MODE_IEEE80211A)
-		rt2x00dev->curr_hwmode = HWMODE_A;
-	else if (phymode == MODE_IEEE80211B)
-		rt2x00dev->curr_hwmode = HWMODE_B;
-	else
-		rt2x00dev->curr_hwmode = HWMODE_G;
-
-	mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
-	rate = &mode->rates[mode->num_rates - 1];
-
-	rt2500pci_config_rate(rt2x00dev, rate->val2);
+	rt2x00pci_register_write(rt2x00dev, ARCSR1, basic_rate_mask);
 }
 
 static void rt2500pci_config_channel(struct rt2x00_dev *rt2x00dev,
-				     const int index, const int channel,
-				     const int txpower)
+				     struct rf_channel *rf, const int txpower)
 {
-	struct rf_channel reg;
 	u8 r70;
 
-	/*
-	 * Fill rf_reg structure.
-	 */
-	memcpy(&reg, &rt2x00dev->spec.channels[index], sizeof(reg));
-
 	/*
 	 * Set TXpower.
 	 */
-	rt2x00_set_field32(&reg.rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
+	rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 
 	/*
 	 * Switch on tuning bits.
 	 * For RT2523 devices we do not need to update the R1 register.
 	 */
 	if (!rt2x00_rf(&rt2x00dev->chip, RF2523))
-		rt2x00_set_field32(&reg.rf1, RF1_TUNER, 1);
-	rt2x00_set_field32(&reg.rf3, RF3_TUNER, 1);
+		rt2x00_set_field32(&rf->rf1, RF1_TUNER, 1);
+	rt2x00_set_field32(&rf->rf3, RF3_TUNER, 1);
 
 	/*
 	 * For RT2525 we should first set the channel to half band higher.
@@ -401,24 +373,24 @@ static void rt2500pci_config_channel(struct rt2x00_dev *rt2x00dev,
 			0x00080d2e, 0x00080d3a
 		};
 
-		rt2500pci_rf_write(rt2x00dev, 1, reg.rf1);
-		rt2500pci_rf_write(rt2x00dev, 2, vals[channel - 1]);
-		rt2500pci_rf_write(rt2x00dev, 3, reg.rf3);
-		if (reg.rf4)
-			rt2500pci_rf_write(rt2x00dev, 4, reg.rf4);
+		rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
+		rt2500pci_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
+		rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
+		if (rf->rf4)
+			rt2500pci_rf_write(rt2x00dev, 4, rf->rf4);
 	}
 
-	rt2500pci_rf_write(rt2x00dev, 1, reg.rf1);
-	rt2500pci_rf_write(rt2x00dev, 2, reg.rf2);
-	rt2500pci_rf_write(rt2x00dev, 3, reg.rf3);
-	if (reg.rf4)
-		rt2500pci_rf_write(rt2x00dev, 4, reg.rf4);
+	rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
+	rt2500pci_rf_write(rt2x00dev, 2, rf->rf2);
+	rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
+	if (rf->rf4)
+		rt2500pci_rf_write(rt2x00dev, 4, rf->rf4);
 
 	/*
 	 * Channel 14 requires the Japan filter bit to be set.
 	 */
 	r70 = 0x46;
-	rt2x00_set_field8(&r70, BBP_R70_JAPAN_FILTER, channel == 14);
+	rt2x00_set_field8(&r70, BBP_R70_JAPAN_FILTER, rf->channel == 14);
 	rt2500pci_bbp_write(rt2x00dev, 70, r70);
 
 	msleep(1);
@@ -428,17 +400,17 @@ static void rt2500pci_config_channel(struct rt2x00_dev *rt2x00dev,
 	 * For RT2523 devices we do not need to update the R1 register.
 	 */
 	if (!rt2x00_rf(&rt2x00dev->chip, RF2523)) {
-		rt2x00_set_field32(&reg.rf1, RF1_TUNER, 0);
-		rt2500pci_rf_write(rt2x00dev, 1, reg.rf1);
+		rt2x00_set_field32(&rf->rf1, RF1_TUNER, 0);
+		rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
 	}
 
-	rt2x00_set_field32(&reg.rf3, RF3_TUNER, 0);
-	rt2500pci_rf_write(rt2x00dev, 3, reg.rf3);
+	rt2x00_set_field32(&rf->rf3, RF3_TUNER, 0);
+	rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
 
 	/*
 	 * Clear false CRC during channel switch.
 	 */
-	rt2x00pci_register_read(rt2x00dev, CNT0, &reg.rf1);
+	rt2x00pci_register_read(rt2x00dev, CNT0, &rf->rf1);
 }
 
 static void rt2500pci_config_txpower(struct rt2x00_dev *rt2x00dev,
@@ -525,26 +497,22 @@ static void rt2500pci_config_antenna(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt2500pci_config_duration(struct rt2x00_dev *rt2x00dev,
-				      const int short_slot_time,
-				      const int beacon_int)
+				      struct rt2x00lib_conf *libconf)
 {
 	u32 reg;
 
 	rt2x00pci_register_read(rt2x00dev, CSR11, &reg);
-	rt2x00_set_field32(&reg, CSR11_SLOT_TIME,
-			   short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME);
+	rt2x00_set_field32(&reg, CSR11_SLOT_TIME, libconf->slot_time);
 	rt2x00pci_register_write(rt2x00dev, CSR11, reg);
 
 	rt2x00pci_register_read(rt2x00dev, CSR18, &reg);
-	rt2x00_set_field32(&reg, CSR18_SIFS, SIFS);
-	rt2x00_set_field32(&reg, CSR18_PIFS,
-			   short_slot_time ? SHORT_PIFS : PIFS);
+	rt2x00_set_field32(&reg, CSR18_SIFS, libconf->sifs);
+	rt2x00_set_field32(&reg, CSR18_PIFS, libconf->pifs);
 	rt2x00pci_register_write(rt2x00dev, CSR18, reg);
 
 	rt2x00pci_register_read(rt2x00dev, CSR19, &reg);
-	rt2x00_set_field32(&reg, CSR19_DIFS,
-			   short_slot_time ? SHORT_DIFS : DIFS);
-	rt2x00_set_field32(&reg, CSR19_EIFS, EIFS);
+	rt2x00_set_field32(&reg, CSR19_DIFS, libconf->difs);
+	rt2x00_set_field32(&reg, CSR19_EIFS, libconf->eifs);
 	rt2x00pci_register_write(rt2x00dev, CSR19, reg);
 
 	rt2x00pci_register_read(rt2x00dev, TXCSR1, &reg);
@@ -553,30 +521,31 @@ static void rt2500pci_config_duration(struct rt2x00_dev *rt2x00dev,
 	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
 
 	rt2x00pci_register_read(rt2x00dev, CSR12, &reg);
-	rt2x00_set_field32(&reg, CSR12_BEACON_INTERVAL, beacon_int * 16);
-	rt2x00_set_field32(&reg, CSR12_CFP_MAX_DURATION, beacon_int * 16);
+	rt2x00_set_field32(&reg, CSR12_BEACON_INTERVAL,
+			   libconf->conf->beacon_int * 16);
+	rt2x00_set_field32(&reg, CSR12_CFP_MAX_DURATION,
+			   libconf->conf->beacon_int * 16);
 	rt2x00pci_register_write(rt2x00dev, CSR12, reg);
 }
 
 static void rt2500pci_config(struct rt2x00_dev *rt2x00dev,
 			     const unsigned int flags,
-			     struct ieee80211_conf *conf)
+			     struct rt2x00lib_conf *libconf)
 {
-	int short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
-
 	if (flags & CONFIG_UPDATE_PHYMODE)
-		rt2500pci_config_phymode(rt2x00dev, conf->phymode);
+		rt2500pci_config_phymode(rt2x00dev, libconf->basic_rates);
 	if (flags & CONFIG_UPDATE_CHANNEL)
-		rt2500pci_config_channel(rt2x00dev, conf->channel_val,
-					 conf->channel, conf->power_level);
+		rt2500pci_config_channel(rt2x00dev, &libconf->rf,
+					 libconf->conf->power_level);
 	if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
-		rt2500pci_config_txpower(rt2x00dev, conf->power_level);
+		rt2500pci_config_txpower(rt2x00dev,
+					 libconf->conf->power_level);
 	if (flags & CONFIG_UPDATE_ANTENNA)
-		rt2500pci_config_antenna(rt2x00dev, conf->antenna_sel_tx,
-					 conf->antenna_sel_rx);
+		rt2500pci_config_antenna(rt2x00dev,
+					 libconf->conf->antenna_sel_tx,
+					 libconf->conf->antenna_sel_rx);
 	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
-		rt2500pci_config_duration(rt2x00dev, short_slot_time,
-					  conf->beacon_int);
+		rt2500pci_config_duration(rt2x00dev, libconf);
 }
 
 /*
@@ -1921,6 +1890,7 @@ static const struct ieee80211_ops rt2500pci_mac80211_ops = {
 	.configure_filter	= rt2500pci_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
 	.set_retry_limit	= rt2500pci_set_retry_limit,
+	.erp_ie_changed		= rt2x00mac_erp_ie_changed,
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.get_tsf		= rt2500pci_get_tsf,
@@ -1946,6 +1916,7 @@ static const struct rt2x00lib_ops rt2500pci_rt2x00_ops = {
 	.config_mac_addr	= rt2500pci_config_mac_addr,
 	.config_bssid		= rt2500pci_config_bssid,
 	.config_type		= rt2500pci_config_type,
+	.config_preamble	= rt2500pci_config_preamble,
 	.config			= rt2500pci_config,
 };
 
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index ef8dffbdffed557fec910ecc8753d87f5f82b151..45f8f744a12dabf201922be8dfb2d586334a3071 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -302,54 +302,39 @@ static void rt2500usb_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
 }
 
-static void rt2500usb_config_rate(struct rt2x00_dev *rt2x00dev, const int rate)
+static void rt2500usb_config_preamble(struct rt2x00_dev *rt2x00dev,
+				      const int short_preamble,
+				      const int ack_timeout,
+				      const int ack_consume_time)
 {
-	struct ieee80211_conf *conf = &rt2x00dev->hw->conf;
 	u16 reg;
-	u16 value;
-	u16 preamble;
-
-	if (DEVICE_GET_RATE_FIELD(rate, PREAMBLE))
-		preamble = SHORT_PREAMBLE;
-	else
-		preamble = PREAMBLE;
 
-	reg = DEVICE_GET_RATE_FIELD(rate, RATEMASK) & DEV_BASIC_RATEMASK;
-
-	rt2500usb_register_write(rt2x00dev, TXRX_CSR11, reg);
+	/*
+	 * When in atomic context, reschedule and let rt2x00lib
+	 * call this function again.
+	 */
+	if (in_atomic()) {
+		queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->config_work);
+		return;
+	}
 
 	rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
-	value = ((conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
-		 SHORT_DIFS : DIFS) +
-	    PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, value);
+	rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, ack_timeout);
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
 
 	rt2500usb_register_read(rt2x00dev, TXRX_CSR10, &reg);
 	rt2x00_set_field16(&reg, TXRX_CSR10_AUTORESPOND_PREAMBLE,
-			   (preamble == SHORT_PREAMBLE));
+			   !!short_preamble);
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR10, reg);
 }
 
 static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
-				     const int phymode)
+				     const int phymode,
+				     const int basic_rate_mask)
 {
-	struct ieee80211_hw_mode *mode;
-	struct ieee80211_rate *rate;
+	rt2500usb_register_write(rt2x00dev, TXRX_CSR11, basic_rate_mask);
 
-	if (phymode == MODE_IEEE80211A)
-		rt2x00dev->curr_hwmode = HWMODE_A;
-	else if (phymode == MODE_IEEE80211B)
-		rt2x00dev->curr_hwmode = HWMODE_B;
-	else
-		rt2x00dev->curr_hwmode = HWMODE_G;
-
-	mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
-	rate = &mode->rates[mode->num_rates - 1];
-
-	rt2500usb_config_rate(rt2x00dev, rate->val2);
-
-	if (phymode == MODE_IEEE80211B) {
+	if (phymode == HWMODE_B) {
 		rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x000b);
 		rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x0040);
 	} else {
@@ -359,20 +344,12 @@ static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
-				     const int index, const int channel,
-				     const int txpower)
+				     struct rf_channel *rf, const int txpower)
 {
-	struct rf_channel reg;
-
-	/*
-	 * Fill rf_reg structure.
-	 */
-	memcpy(&reg, &rt2x00dev->spec.channels[index], sizeof(reg));
-
 	/*
 	 * Set TXpower.
 	 */
-	rt2x00_set_field32(&reg.rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
+	rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 
 	/*
 	 * For RT2525E we should first set the channel to half band higher.
@@ -385,16 +362,16 @@ static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
 			0x00000902, 0x00000906
 		};
 
-		rt2500usb_rf_write(rt2x00dev, 2, vals[channel - 1]);
-		if (reg.rf4)
-			rt2500usb_rf_write(rt2x00dev, 4, reg.rf4);
+		rt2500usb_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
+		if (rf->rf4)
+			rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 	}
 
-	rt2500usb_rf_write(rt2x00dev, 1, reg.rf1);
-	rt2500usb_rf_write(rt2x00dev, 2, reg.rf2);
-	rt2500usb_rf_write(rt2x00dev, 3, reg.rf3);
-	if (reg.rf4)
-		rt2500usb_rf_write(rt2x00dev, 4, reg.rf4);
+	rt2500usb_rf_write(rt2x00dev, 1, rf->rf1);
+	rt2500usb_rf_write(rt2x00dev, 2, rf->rf2);
+	rt2500usb_rf_write(rt2x00dev, 3, rf->rf3);
+	if (rf->rf4)
+		rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 }
 
 static void rt2500usb_config_txpower(struct rt2x00_dev *rt2x00dev,
@@ -484,38 +461,37 @@ static void rt2500usb_config_antenna(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt2500usb_config_duration(struct rt2x00_dev *rt2x00dev,
-				      const int short_slot_time,
-				      const int beacon_int)
+				      struct rt2x00lib_conf *libconf)
 {
 	u16 reg;
 
-	rt2500usb_register_write(rt2x00dev, MAC_CSR10,
-				 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME);
+	rt2500usb_register_write(rt2x00dev, MAC_CSR10, libconf->slot_time);
 
 	rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
-	rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL, beacon_int * 4);
+	rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL,
+			   libconf->conf->beacon_int * 4);
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
 }
 
 static void rt2500usb_config(struct rt2x00_dev *rt2x00dev,
 			     const unsigned int flags,
-			     struct ieee80211_conf *conf)
+			     struct rt2x00lib_conf *libconf)
 {
-	int short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
-
 	if (flags & CONFIG_UPDATE_PHYMODE)
-		rt2500usb_config_phymode(rt2x00dev, conf->phymode);
+		rt2500usb_config_phymode(rt2x00dev, libconf->phymode,
+					 libconf->basic_rates);
 	if (flags & CONFIG_UPDATE_CHANNEL)
-		rt2500usb_config_channel(rt2x00dev, conf->channel_val,
-					 conf->channel, conf->power_level);
+		rt2500usb_config_channel(rt2x00dev, &libconf->rf,
+					 libconf->conf->power_level);
 	if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
-		rt2500usb_config_txpower(rt2x00dev, conf->power_level);
+		rt2500usb_config_txpower(rt2x00dev,
+					 libconf->conf->power_level);
 	if (flags & CONFIG_UPDATE_ANTENNA)
-		rt2500usb_config_antenna(rt2x00dev, conf->antenna_sel_tx,
-					 conf->antenna_sel_rx);
+		rt2500usb_config_antenna(rt2x00dev,
+					 libconf->conf->antenna_sel_tx,
+					 libconf->conf->antenna_sel_rx);
 	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
-		rt2500usb_config_duration(rt2x00dev, short_slot_time,
-					  conf->beacon_int);
+		rt2500usb_config_duration(rt2x00dev, libconf);
 }
 
 /*
@@ -1733,6 +1709,7 @@ static const struct ieee80211_ops rt2500usb_mac80211_ops = {
 	.config_interface	= rt2x00mac_config_interface,
 	.configure_filter	= rt2500usb_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
+	.erp_ie_changed		= rt2x00mac_erp_ie_changed,
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.beacon_update		= rt2500usb_beacon_update,
@@ -1754,6 +1731,7 @@ static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
 	.config_mac_addr	= rt2500usb_config_mac_addr,
 	.config_bssid		= rt2500usb_config_bssid,
 	.config_type		= rt2500usb_config_type,
+	.config_preamble	= rt2500usb_config_preamble,
 	.config			= rt2500usb_config,
 };
 
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index a392e2a9d087a24314937664f5d2ca45576f6924..aabbe425470faf7aec76359caa0b8de497f1defd 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -351,6 +351,28 @@ struct hw_mode_spec {
 	const struct rf_channel *channels;
 };
 
+/*
+ * Configuration structure wrapper around the
+ * mac80211 configuration structure.
+ * When mac80211 configures the driver, rt2x00lib
+ * can precalculate values which are equal for all
+ * rt2x00 drivers. Those values can be stored in here.
+ */
+struct rt2x00lib_conf {
+	struct ieee80211_conf *conf;
+	struct rf_channel rf;
+
+	int phymode;
+
+	int basic_rates;
+	int slot_time;
+
+	short sifs;
+	short pifs;
+	short difs;
+	short eifs;
+};
+
 /*
  * rt2x00lib callback functions.
  */
@@ -414,8 +436,12 @@ struct rt2x00lib_ops {
 	void (*config_bssid) (struct rt2x00_dev *rt2x00dev, __le32 *bssid);
 	void (*config_type) (struct rt2x00_dev *rt2x00dev, const int type,
 							   const int tsf_sync);
+	void (*config_preamble) (struct rt2x00_dev *rt2x00dev,
+				 const int short_preamble,
+				 const int ack_timeout,
+				 const int ack_consume_time);
 	void (*config) (struct rt2x00_dev *rt2x00dev, const unsigned int flags,
-			struct ieee80211_conf *conf);
+			struct rt2x00lib_conf *libconf);
 #define CONFIG_UPDATE_PHYMODE		( 1 << 1 )
 #define CONFIG_UPDATE_CHANNEL		( 1 << 2 )
 #define CONFIG_UPDATE_TXPOWER		( 1 << 3 )
@@ -472,6 +498,7 @@ enum rt2x00_flags {
 	CONFIG_EXTERNAL_LNA_BG,
 	CONFIG_DOUBLE_ANTENNA,
 	CONFIG_DISABLE_LINK_TUNING,
+	CONFIG_SHORT_PREAMBLE,
 };
 
 /*
@@ -612,6 +639,7 @@ struct rt2x00_dev {
 	 */
 	struct work_struct beacon_work;
 	struct work_struct filter_work;
+	struct work_struct config_work;
 
 	/*
 	 * Data ring arrays for RX, TX and Beacon.
@@ -792,6 +820,8 @@ int rt2x00mac_get_stats(struct ieee80211_hw *hw,
 			struct ieee80211_low_level_stats *stats);
 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
 			   struct ieee80211_tx_queue_stats *stats);
+void rt2x00mac_erp_ie_changed(struct ieee80211_hw *hw, u8 changes,
+			      int cts_protection, int preamble);
 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
 		      const struct ieee80211_tx_queue_params *params);
 
diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index f8e87aa863357d015b1762856c2ca73447414d2e..12914cf7156cb4fc6582dd6cbfe06b96ed4fb4bb 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -97,7 +97,11 @@ void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
 void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 		      struct ieee80211_conf *conf, const int force_config)
 {
+	struct rt2x00lib_conf libconf;
+	struct ieee80211_hw_mode *mode;
+	struct ieee80211_rate *rate;
 	int flags = 0;
+	int short_slot_time;
 
 	/*
 	 * In some situations we want to force all configurations
@@ -128,8 +132,62 @@ void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 	flags |= CONFIG_UPDATE_SLOT_TIME;
 	flags |= CONFIG_UPDATE_BEACON_INT;
 
+	/*
+	 * We have determined what options should be updated,
+	 * now precalculate device configuration values depending
+	 * on what configuration options need to be updated.
+	 */
 config:
-	rt2x00dev->ops->lib->config(rt2x00dev, flags, conf);
+	memset(&libconf, 0, sizeof(libconf));
+
+	if (flags & CONFIG_UPDATE_PHYMODE) {
+		switch (conf->phymode) {
+		case MODE_IEEE80211A:
+			libconf.phymode = HWMODE_A;
+			break;
+		case MODE_IEEE80211B:
+			libconf.phymode = HWMODE_B;
+			break;
+		case MODE_IEEE80211G:
+			libconf.phymode = HWMODE_G;
+			break;
+		default:
+			ERROR(rt2x00dev,
+			      "Attempt to configure unsupported mode (%d)"
+			      "Defaulting to 802.11b", conf->phymode);
+			libconf.phymode = HWMODE_B;
+		}
+
+		mode = &rt2x00dev->hwmodes[libconf.phymode];
+		rate = &mode->rates[mode->num_rates - 1];
+
+		libconf.basic_rates =
+		    DEVICE_GET_RATE_FIELD(rate->val, RATEMASK) & DEV_BASIC_RATEMASK;
+	}
+
+	if (flags & CONFIG_UPDATE_CHANNEL) {
+		memcpy(&libconf.rf,
+		       &rt2x00dev->spec.channels[conf->channel_val],
+		       sizeof(libconf.rf));
+	}
+
+	if (flags & CONFIG_UPDATE_SLOT_TIME) {
+		short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
+
+		libconf.slot_time =
+		    short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME;
+		libconf.sifs = SIFS;
+		libconf.pifs = short_slot_time ? SHORT_PIFS : PIFS;
+		libconf.difs = short_slot_time ? SHORT_DIFS : DIFS;
+		libconf.eifs = EIFS;
+	}
+
+	libconf.conf = conf;
+
+	/*
+	 * Start configuration.
+	 */
+	rt2x00dev->ops->lib->config(rt2x00dev, flags, &libconf);
 
 	/*
 	 * Some configuration changes affect the link quality
@@ -138,6 +196,7 @@ void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
 	if (flags & (CONFIG_UPDATE_CHANNEL | CONFIG_UPDATE_ANTENNA))
 		rt2x00lib_reset_link_tuner(rt2x00dev);
 
+	rt2x00dev->curr_hwmode = libconf.phymode;
 	rt2x00dev->rx_status.phymode = conf->phymode;
 	rt2x00dev->rx_status.freq = conf->freq;
 	rt2x00dev->rx_status.channel = conf->channel;
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index e1410486917240cc59c40173d14cfda22638b9c6..bb6f46cfbb9f87e27dc792d52a1aed4ba5218706 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -142,6 +142,8 @@ void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
 		cancel_work_sync(&rt2x00dev->beacon_work);
 	if (work_pending(&rt2x00dev->filter_work))
 		cancel_work_sync(&rt2x00dev->filter_work);
+	if (work_pending(&rt2x00dev->config_work))
+		cancel_work_sync(&rt2x00dev->config_work);
 
 	/*
 	 * Stop the TX queues.
@@ -288,6 +290,16 @@ static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
 					     filter, &filter, 0, NULL);
 }
 
+static void rt2x00lib_configuration_scheduled(struct work_struct *work)
+{
+	struct rt2x00_dev *rt2x00dev =
+	    container_of(work, struct rt2x00_dev, config_work);
+	int preamble = !test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
+
+	rt2x00mac_erp_ie_changed(rt2x00dev->hw,
+				 IEEE80211_ERP_CHANGE_PREAMBLE, 0, preamble);
+}
+
 /*
  * Interrupt context handlers.
  */
@@ -990,6 +1002,7 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
 	 */
 	INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled);
 	INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
+	INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled);
 	INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
 
 	/*
diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index f519d73968480fc5fb1686178215fac367ac20b1..4a6a0bd01ff192ead09ab3b929f33f57f7c18882 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -365,6 +365,40 @@ int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
 }
 EXPORT_SYMBOL_GPL(rt2x00mac_get_tx_stats);
 
+void rt2x00mac_erp_ie_changed(struct ieee80211_hw *hw, u8 changes,
+			      int cts_protection, int preamble)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	int short_preamble;
+	int ack_timeout;
+	int ack_consume_time;
+	int difs;
+
+	/*
+	 * We only support changing preamble mode.
+	 */
+	if (!(changes & IEEE80211_ERP_CHANGE_PREAMBLE))
+		return;
+
+	short_preamble = !preamble;
+	preamble = !!(preamble) ? PREAMBLE : SHORT_PREAMBLE;
+
+	difs = (hw->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
+		SHORT_DIFS : DIFS;
+	ack_timeout = difs + PLCP + preamble + get_duration(ACK_SIZE, 10);
+
+	ack_consume_time = SIFS + PLCP + preamble + get_duration(ACK_SIZE, 10);
+
+	if (short_preamble)
+		__set_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
+	else
+		__clear_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
+
+	rt2x00dev->ops->lib->config_preamble(rt2x00dev, short_preamble,
+					     ack_timeout, ack_consume_time);
+}
+EXPORT_SYMBOL_GPL(rt2x00mac_erp_ie_changed);
+
 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
 		      const struct ieee80211_tx_queue_params *params)
 {
diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index cd22817cced5b5bc8cd04f56a4da48941b1f861e..1a869a5cbe911eef2d561e6bb61157fcc8197318 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -328,62 +328,31 @@ static void rt61pci_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 	rt2x00pci_register_write(rt2x00dev, TXRX_CSR9, reg);
 }
 
-static void rt61pci_config_rate(struct rt2x00_dev *rt2x00dev, const int rate)
+static void rt61pci_config_preamble(struct rt2x00_dev *rt2x00dev,
+				    const int short_preamble,
+				    const int ack_timeout,
+				    const int ack_consume_time)
 {
-	struct ieee80211_conf *conf = &rt2x00dev->hw->conf;
 	u32 reg;
-	u32 value;
-	u32 preamble;
-
-	if (DEVICE_GET_RATE_FIELD(rate, PREAMBLE))
-		preamble = SHORT_PREAMBLE;
-	else
-		preamble = PREAMBLE;
-
-	/*
-	 * Extract the allowed ratemask from the device specific rate value,
-	 * We need to set TXRX_CSR5 to the basic rate mask so we need to mask
-	 * off the non-basic rates.
-	 */
-	reg = DEVICE_GET_RATE_FIELD(rate, RATEMASK) & DEV_BASIC_RATEMASK;
-
-	rt2x00pci_register_write(rt2x00dev, TXRX_CSR5, reg);
 
 	rt2x00pci_register_read(rt2x00dev, TXRX_CSR0, &reg);
-	value = ((conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
-		 SHORT_DIFS : DIFS) +
-	    PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field32(&reg, TXRX_CSR0_RX_ACK_TIMEOUT, value);
+	rt2x00_set_field32(&reg, TXRX_CSR0_RX_ACK_TIMEOUT, ack_timeout);
 	rt2x00pci_register_write(rt2x00dev, TXRX_CSR0, reg);
 
 	rt2x00pci_register_read(rt2x00dev, TXRX_CSR4, &reg);
 	rt2x00_set_field32(&reg, TXRX_CSR4_AUTORESPOND_PREAMBLE,
-			   (preamble == SHORT_PREAMBLE));
+			   !!short_preamble);
 	rt2x00pci_register_write(rt2x00dev, TXRX_CSR4, reg);
 }
 
 static void rt61pci_config_phymode(struct rt2x00_dev *rt2x00dev,
-				   const int phymode)
+				   const int basic_rate_mask)
 {
-	struct ieee80211_hw_mode *mode;
-	struct ieee80211_rate *rate;
-
-	if (phymode == MODE_IEEE80211A)
-		rt2x00dev->curr_hwmode = HWMODE_A;
-	else if (phymode == MODE_IEEE80211B)
-		rt2x00dev->curr_hwmode = HWMODE_B;
-	else
-		rt2x00dev->curr_hwmode = HWMODE_G;
-
-	mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
-	rate = &mode->rates[mode->num_rates - 1];
-
-	rt61pci_config_rate(rt2x00dev, rate->val2);
+	rt2x00pci_register_write(rt2x00dev, TXRX_CSR5, basic_rate_mask);
 }
 
-static void rt61pci_config_lock_channel(struct rt2x00_dev *rt2x00dev,
-					struct rf_channel *rf,
-					const int txpower)
+static void rt61pci_config_channel(struct rt2x00_dev *rt2x00dev,
+				   struct rf_channel *rf, const int txpower)
 {
 	u8 r3;
 	u8 r94;
@@ -428,20 +397,6 @@ static void rt61pci_config_lock_channel(struct rt2x00_dev *rt2x00dev,
 	msleep(1);
 }
 
-static void rt61pci_config_channel(struct rt2x00_dev *rt2x00dev,
-				   const int index, const int channel,
-				   const int txpower)
-{
-	struct rf_channel rf;
-
-	/*
-	 * Fill rf_reg structure.
-	 */
-	memcpy(&rf, &rt2x00dev->spec.channels[index], sizeof(rf));
-
-	rt61pci_config_lock_channel(rt2x00dev, &rf, txpower);
-}
-
 static void rt61pci_config_txpower(struct rt2x00_dev *rt2x00dev,
 				   const int txpower)
 {
@@ -452,7 +407,7 @@ static void rt61pci_config_txpower(struct rt2x00_dev *rt2x00dev,
 	rt2x00_rf_read(rt2x00dev, 3, &rf.rf3);
 	rt2x00_rf_read(rt2x00dev, 4, &rf.rf4);
 
-	rt61pci_config_lock_channel(rt2x00dev, &rf, txpower);
+	rt61pci_config_channel(rt2x00dev, &rf, txpower);
 }
 
 static void rt61pci_config_antenna_5x(struct rt2x00_dev *rt2x00dev,
@@ -714,20 +669,18 @@ static void rt61pci_config_antenna(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt61pci_config_duration(struct rt2x00_dev *rt2x00dev,
-				    const int short_slot_time,
-				    const int beacon_int)
+				    struct rt2x00lib_conf *libconf)
 {
 	u32 reg;
 
 	rt2x00pci_register_read(rt2x00dev, MAC_CSR9, &reg);
-	rt2x00_set_field32(&reg, MAC_CSR9_SLOT_TIME,
-			   short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME);
+	rt2x00_set_field32(&reg, MAC_CSR9_SLOT_TIME, libconf->slot_time);
 	rt2x00pci_register_write(rt2x00dev, MAC_CSR9, reg);
 
 	rt2x00pci_register_read(rt2x00dev, MAC_CSR8, &reg);
-	rt2x00_set_field32(&reg, MAC_CSR8_SIFS, SIFS);
+	rt2x00_set_field32(&reg, MAC_CSR8_SIFS, libconf->sifs);
 	rt2x00_set_field32(&reg, MAC_CSR8_SIFS_AFTER_RX_OFDM, 3);
-	rt2x00_set_field32(&reg, MAC_CSR8_EIFS, EIFS);
+	rt2x00_set_field32(&reg, MAC_CSR8_EIFS, libconf->eifs);
 	rt2x00pci_register_write(rt2x00dev, MAC_CSR8, reg);
 
 	rt2x00pci_register_read(rt2x00dev, TXRX_CSR0, &reg);
@@ -739,29 +692,27 @@ static void rt61pci_config_duration(struct rt2x00_dev *rt2x00dev,
 	rt2x00pci_register_write(rt2x00dev, TXRX_CSR4, reg);
 
 	rt2x00pci_register_read(rt2x00dev, TXRX_CSR9, &reg);
-	rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_INTERVAL, beacon_int * 16);
+	rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_INTERVAL,
+			   libconf->conf->beacon_int * 16);
 	rt2x00pci_register_write(rt2x00dev, TXRX_CSR9, reg);
 }
 
 static void rt61pci_config(struct rt2x00_dev *rt2x00dev,
 			   const unsigned int flags,
-			   struct ieee80211_conf *conf)
+			   struct rt2x00lib_conf *libconf)
 {
-	int short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
-
 	if (flags & CONFIG_UPDATE_PHYMODE)
-		rt61pci_config_phymode(rt2x00dev, conf->phymode);
+		rt61pci_config_phymode(rt2x00dev, libconf->basic_rates);
 	if (flags & CONFIG_UPDATE_CHANNEL)
-		rt61pci_config_channel(rt2x00dev, conf->channel_val,
-				       conf->channel, conf->power_level);
+		rt61pci_config_channel(rt2x00dev, &libconf->rf,
+				       libconf->conf->power_level);
 	if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
-		rt61pci_config_txpower(rt2x00dev, conf->power_level);
+		rt61pci_config_txpower(rt2x00dev, libconf->conf->power_level);
 	if (flags & CONFIG_UPDATE_ANTENNA)
-		rt61pci_config_antenna(rt2x00dev, conf->antenna_sel_tx,
-				       conf->antenna_sel_rx);
+		rt61pci_config_antenna(rt2x00dev, libconf->conf->antenna_sel_tx,
+				       libconf->conf->antenna_sel_rx);
 	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
-		rt61pci_config_duration(rt2x00dev, short_slot_time,
-					conf->beacon_int);
+		rt61pci_config_duration(rt2x00dev, libconf);
 }
 
 /*
@@ -2513,6 +2464,7 @@ static const struct ieee80211_ops rt61pci_mac80211_ops = {
 	.configure_filter	= rt61pci_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
 	.set_retry_limit	= rt61pci_set_retry_limit,
+	.erp_ie_changed		= rt2x00mac_erp_ie_changed,
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.get_tsf		= rt61pci_get_tsf,
@@ -2539,6 +2491,7 @@ static const struct rt2x00lib_ops rt61pci_rt2x00_ops = {
 	.config_mac_addr	= rt61pci_config_mac_addr,
 	.config_bssid		= rt61pci_config_bssid,
 	.config_type		= rt61pci_config_type,
+	.config_preamble	= rt61pci_config_preamble,
 	.config			= rt61pci_config,
 };
 
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 9e1bf4d77e102be48ef490e7c9d02e0b9664a5a5..984117fe1f5e4ae596e5c55a4a8e703148780f35 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -308,57 +308,40 @@ static void rt73usb_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 	rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
 }
 
-static void rt73usb_config_rate(struct rt2x00_dev *rt2x00dev, const int rate)
+static void rt73usb_config_preamble(struct rt2x00_dev *rt2x00dev,
+				      const int short_preamble,
+				      const int ack_timeout,
+				      const int ack_consume_time)
 {
-	struct ieee80211_conf *conf = &rt2x00dev->hw->conf;
 	u32 reg;
-	u32 value;
-	u32 preamble;
 
-	if (DEVICE_GET_RATE_FIELD(rate, PREAMBLE))
-		preamble = SHORT_PREAMBLE;
-	else
-		preamble = PREAMBLE;
-
-	reg = DEVICE_GET_RATE_FIELD(rate, RATEMASK) & DEV_BASIC_RATEMASK;
-
-	rt73usb_register_write(rt2x00dev, TXRX_CSR5, reg);
+	/*
+	 * When in atomic context, reschedule and let rt2x00lib
+	 * call this function again.
+	 */
+	if (in_atomic()) {
+		queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->config_work);
+		return;
+	}
 
 	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
-	value = ((conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
-		 SHORT_DIFS : DIFS) +
-	    PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field32(&reg, TXRX_CSR0_RX_ACK_TIMEOUT, value);
+	rt2x00_set_field32(&reg, TXRX_CSR0_RX_ACK_TIMEOUT, ack_timeout);
 	rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
 
 	rt73usb_register_read(rt2x00dev, TXRX_CSR4, &reg);
 	rt2x00_set_field32(&reg, TXRX_CSR4_AUTORESPOND_PREAMBLE,
-			   (preamble == SHORT_PREAMBLE));
+			   !!short_preamble);
 	rt73usb_register_write(rt2x00dev, TXRX_CSR4, reg);
 }
 
 static void rt73usb_config_phymode(struct rt2x00_dev *rt2x00dev,
-				   const int phymode)
+				   const int basic_rate_mask)
 {
-	struct ieee80211_hw_mode *mode;
-	struct ieee80211_rate *rate;
-
-	if (phymode == MODE_IEEE80211A)
-		rt2x00dev->curr_hwmode = HWMODE_A;
-	else if (phymode == MODE_IEEE80211B)
-		rt2x00dev->curr_hwmode = HWMODE_B;
-	else
-		rt2x00dev->curr_hwmode = HWMODE_G;
-
-	mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
-	rate = &mode->rates[mode->num_rates - 1];
-
-	rt73usb_config_rate(rt2x00dev, rate->val2);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR5, basic_rate_mask);
 }
 
-static void rt73usb_config_lock_channel(struct rt2x00_dev *rt2x00dev,
-					struct rf_channel *rf,
-					const int txpower)
+static void rt73usb_config_channel(struct rt2x00_dev *rt2x00dev,
+				   struct rf_channel *rf, const int txpower)
 {
 	u8 r3;
 	u8 r94;
@@ -399,20 +382,6 @@ static void rt73usb_config_lock_channel(struct rt2x00_dev *rt2x00dev,
 	udelay(10);
 }
 
-static void rt73usb_config_channel(struct rt2x00_dev *rt2x00dev,
-				   const int index, const int channel,
-				   const int txpower)
-{
-	struct rf_channel rf;
-
-	/*
-	 * Fill rf_reg structure.
-	 */
-	memcpy(&rf, &rt2x00dev->spec.channels[index], sizeof(rf));
-
-	rt73usb_config_lock_channel(rt2x00dev, &rf, txpower);
-}
-
 static void rt73usb_config_txpower(struct rt2x00_dev *rt2x00dev,
 				   const int txpower)
 {
@@ -423,7 +392,7 @@ static void rt73usb_config_txpower(struct rt2x00_dev *rt2x00dev,
 	rt2x00_rf_read(rt2x00dev, 3, &rf.rf3);
 	rt2x00_rf_read(rt2x00dev, 4, &rf.rf4);
 
-	rt73usb_config_lock_channel(rt2x00dev, &rf, txpower);
+	rt73usb_config_channel(rt2x00dev, &rf, txpower);
 }
 
 static void rt73usb_config_antenna_5x(struct rt2x00_dev *rt2x00dev,
@@ -577,20 +546,18 @@ static void rt73usb_config_antenna(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt73usb_config_duration(struct rt2x00_dev *rt2x00dev,
-				    const int short_slot_time,
-				    const int beacon_int)
+				    struct rt2x00lib_conf *libconf)
 {
 	u32 reg;
 
 	rt73usb_register_read(rt2x00dev, MAC_CSR9, &reg);
-	rt2x00_set_field32(&reg, MAC_CSR9_SLOT_TIME,
-			   short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME);
+	rt2x00_set_field32(&reg, MAC_CSR9_SLOT_TIME, libconf->slot_time);
 	rt73usb_register_write(rt2x00dev, MAC_CSR9, reg);
 
 	rt73usb_register_read(rt2x00dev, MAC_CSR8, &reg);
-	rt2x00_set_field32(&reg, MAC_CSR8_SIFS, SIFS);
+	rt2x00_set_field32(&reg, MAC_CSR8_SIFS, libconf->sifs);
 	rt2x00_set_field32(&reg, MAC_CSR8_SIFS_AFTER_RX_OFDM, 3);
-	rt2x00_set_field32(&reg, MAC_CSR8_EIFS, EIFS);
+	rt2x00_set_field32(&reg, MAC_CSR8_EIFS, libconf->eifs);
 	rt73usb_register_write(rt2x00dev, MAC_CSR8, reg);
 
 	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
@@ -602,29 +569,27 @@ static void rt73usb_config_duration(struct rt2x00_dev *rt2x00dev,
 	rt73usb_register_write(rt2x00dev, TXRX_CSR4, reg);
 
 	rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
-	rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_INTERVAL, beacon_int * 16);
+	rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_INTERVAL,
+			   libconf->conf->beacon_int * 16);
 	rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
 }
 
 static void rt73usb_config(struct rt2x00_dev *rt2x00dev,
 			   const unsigned int flags,
-			   struct ieee80211_conf *conf)
+			   struct rt2x00lib_conf *libconf)
 {
-	int short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
-
 	if (flags & CONFIG_UPDATE_PHYMODE)
-		rt73usb_config_phymode(rt2x00dev, conf->phymode);
+		rt73usb_config_phymode(rt2x00dev, libconf->basic_rates);
 	if (flags & CONFIG_UPDATE_CHANNEL)
-		rt73usb_config_channel(rt2x00dev, conf->channel_val,
-				       conf->channel, conf->power_level);
+		rt73usb_config_channel(rt2x00dev, &libconf->rf,
+				       libconf->conf->power_level);
 	if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
-		rt73usb_config_txpower(rt2x00dev, conf->power_level);
+		rt73usb_config_txpower(rt2x00dev, libconf->conf->power_level);
 	if (flags & CONFIG_UPDATE_ANTENNA)
-		rt73usb_config_antenna(rt2x00dev, conf->antenna_sel_tx,
-				       conf->antenna_sel_rx);
+		rt73usb_config_antenna(rt2x00dev, libconf->conf->antenna_sel_tx,
+				       libconf->conf->antenna_sel_rx);
 	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
-		rt73usb_config_duration(rt2x00dev, short_slot_time,
-					conf->beacon_int);
+		rt73usb_config_duration(rt2x00dev, libconf);
 }
 
 /*
@@ -2002,6 +1967,7 @@ static const struct ieee80211_ops rt73usb_mac80211_ops = {
 	.configure_filter	= rt73usb_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
 	.set_retry_limit	= rt73usb_set_retry_limit,
+	.erp_ie_changed		= rt2x00mac_erp_ie_changed,
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 #if 0
@@ -2032,6 +1998,7 @@ static const struct rt2x00lib_ops rt73usb_rt2x00_ops = {
 	.config_mac_addr	= rt73usb_config_mac_addr,
 	.config_bssid		= rt73usb_config_bssid,
 	.config_type		= rt73usb_config_type,
+	.config_preamble	= rt73usb_config_preamble,
 	.config			= rt73usb_config,
 };