rt2x00: rt2800lib: use {tx,rx}_chain_num to avoid superfluous EEPROM access

The {rx,tx}_chain_num fields of rt2x00dev->default_ant
contains the number of RX and TX chains already when the
rt2800_probe_hw_mode() function runs. Use those values
instead of parsing the EEPROM configuration values again.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index aa87894..3ca0d3e 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -7450,7 +7450,6 @@ static int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
        char *default_power2;
        char *default_power3;
        unsigned int i;
-       u16 eeprom;
        u32 reg;
 
        /*
@@ -7499,8 +7498,6 @@ static int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
        rt2x00dev->hw->max_report_rates = 7;
        rt2x00dev->hw->max_rate_tries = 1;
 
-       rt2800_eeprom_read(rt2x00dev, EEPROM_NIC_CONF0, &eeprom);
-
        /*
         * Initialize hw_mode information.
         */
@@ -7566,22 +7563,21 @@ static int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
            IEEE80211_HT_CAP_SGI_20 |
            IEEE80211_HT_CAP_SGI_40;
 
-       if (rt2x00_get_field16(eeprom, EEPROM_NIC_CONF0_TXPATH) >= 2)
+       if (rt2x00dev->default_ant.tx_chain_num >= 2)
                spec->ht.cap |= IEEE80211_HT_CAP_TX_STBC;
 
-       spec->ht.cap |=
-           rt2x00_get_field16(eeprom, EEPROM_NIC_CONF0_RXPATH) <<
-               IEEE80211_HT_CAP_RX_STBC_SHIFT;
+       spec->ht.cap |= rt2x00dev->default_ant.rx_chain_num <<
+                       IEEE80211_HT_CAP_RX_STBC_SHIFT;
 
        spec->ht.ampdu_factor = 3;
        spec->ht.ampdu_density = 4;
        spec->ht.mcs.tx_params =
            IEEE80211_HT_MCS_TX_DEFINED |
            IEEE80211_HT_MCS_TX_RX_DIFF |
-           ((rt2x00_get_field16(eeprom, EEPROM_NIC_CONF0_TXPATH) - 1) <<
-               IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
+           ((rt2x00dev->default_ant.tx_chain_num - 1) <<
+            IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 
-       switch (rt2x00_get_field16(eeprom, EEPROM_NIC_CONF0_RXPATH)) {
+       switch (rt2x00dev->default_ant.rx_chain_num) {
        case 3:
                spec->ht.mcs.rx_mask[2] = 0xff;
        case 2: