From 0e7d38132bf8fbf6651add139ef506106d91ab29 Mon Sep 17 00:00:00 2001 From: Ping-Ke Shih Date: Fri, 10 May 2019 16:03:32 +0800 Subject: [PATCH] rtlwifi: 8192de: Fix used uninitialized variables in power tracking ofdm_index_old[] is the index of ofdmswing_table[], and used to indicate initial value of ROFDM0_X{A,B}TXIQIMBALANCE in rtl8192de_phy_reg_2tarray[] table, and the initial value is corresponding to calibration thermal value written in efuse, namely rtlefuse->eeprom_thermalmeter. Then, local variable ofdm_index_old[] save to rtlpriv->dm.ofdm_index[] for operational use. If thermal value (temperature) is increasing, output TX power is lower. So, we calculate the delta between current and calibration thermal value, then add power to yield expected and the same output TX power. Thus, ofdm_index[] should be initialized as rtlpriv->dm.ofdm_index[], and shift to proper index depends on delta of thermal value. Then, new power value ofdmswing_table[ofdm_index[]] is written to register. Reported-by: Colin Ian King Signed-off-by: Ping-Ke Shih Signed-off-by: Kalle Valo --- drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c index cc9f01a19845..df02cb6e5e91 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/dm.c @@ -787,9 +787,9 @@ static void rtl92d_dm_txpower_tracking_callback_thermalmeter( bool internal_pa = false; long ele_a = 0, ele_d, temp_cck, val_x, value32; long val_y, ele_c = 0; - u8 ofdm_index[3]; + u8 ofdm_index[2]; s8 cck_index = 0; - u8 ofdm_index_old[3] = {0, 0, 0}; + u8 ofdm_index_old[2] = {0, 0}; s8 cck_index_old = 0; u8 index; int i; @@ -846,6 +846,9 @@ static void rtl92d_dm_txpower_tracking_callback_thermalmeter( else rf = 1; + if (rtlpriv->dm.thermalvalue && !rtlhal->reloadtxpowerindex) + goto old_index_done; + ele_d = rtl_get_bbreg(hw, ROFDM0_XATXIQIMBALANCE, MASKDWORD) & MASKOFDM_D; for (i = 0; i < OFDM_TABLE_SIZE_92D; i++) { if (ele_d == (ofdmswing_table[i] & MASKOFDM_D)) { @@ -897,6 +900,10 @@ static void rtl92d_dm_txpower_tracking_callback_thermalmeter( RT_TRACE(rtlpriv, COMP_POWER_TRACKING, DBG_LOUD, "reload ofdm index for band switch\n"); } +old_index_done: + for (i = 0; i < rf; i++) + ofdm_index[i] = rtlpriv->dm.ofdm_index[i]; + rtlpriv->dm.thermalvalue_avg [rtlpriv->dm.thermalvalue_avg_index] = thermalvalue; rtlpriv->dm.thermalvalue_avg_index++; -- 2.30.2