ath5k: fix wrong max power per rate eeprom reads for 802.11a

This patch reduces the per rate target power eeprom reads for
AR5K_EEPROM_MODE_11A from 10 to 8, as there are only 8 valid
power curve entries on the eeprom. The former 10 reads lead to
equal max power limits per rate and this causes an increasing
distortion for all rates above 24 MBit and leads to a needless
poor performance in 802.11a mode.

Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath5k/eeprom.c b/drivers/net/wireless/ath/ath5k/eeprom.c
index 4026c906cc7b45745e3a80dbc5edc9360413f78f..b7e0258887e70cf9be193c70e73334e9e8fe0473 100644 (file)
--- a/drivers/net/wireless/ath/ath5k/eeprom.c
+++ b/drivers/net/wireless/ath/ath5k/eeprom.c
@@ -1482,7 +1482,7 @@ ath5k_eeprom_read_target_rate_pwr_info(struct ath5k_hw *ah, unsigned int mode)
        case AR5K_EEPROM_MODE_11A:
                offset += AR5K_EEPROM_TARGET_PWR_OFF_11A(ee->ee_version);
                rate_pcal_info = ee->ee_rate_tpwr_a;
-               ee->ee_rate_target_pwr_num[mode] = AR5K_EEPROM_N_5GHZ_CHAN;
+               ee->ee_rate_target_pwr_num[mode] = AR5K_EEPROM_N_5GHZ_RATE_CHAN;
                break;
        case AR5K_EEPROM_MODE_11B:
                offset += AR5K_EEPROM_TARGET_PWR_OFF_11B(ee->ee_version);

diff --git a/drivers/net/wireless/ath/ath5k/eeprom.h b/drivers/net/wireless/ath/ath5k/eeprom.h
index dc2bcfeadeb45b121de183bd558045a69dda47ba..94a9bbea6874c0daf10510e26fa2862f8ebbfa81 100644 (file)
--- a/drivers/net/wireless/ath/ath5k/eeprom.h
+++ b/drivers/net/wireless/ath/ath5k/eeprom.h
@@ -182,6 +182,7 @@
 #define AR5K_EEPROM_EEP_DELTA          10
 #define AR5K_EEPROM_N_MODES            3
 #define AR5K_EEPROM_N_5GHZ_CHAN                10
+#define AR5K_EEPROM_N_5GHZ_RATE_CHAN   8
 #define AR5K_EEPROM_N_2GHZ_CHAN                3
 #define AR5K_EEPROM_N_2GHZ_CHAN_2413   4
 #define        AR5K_EEPROM_N_2GHZ_CHAN_MAX     4