staging: rtl8192e: Remove unchanged variable dig_algorithm

Remove variable dig_algorithm as its value is set to DIG_ALGO_BY_RSSI at
initialization. No further writes to dig_algorithm are done. The
equations result accordingly. Remove dead code.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/66f7275aa46e68577cc4c20582ffbd16de13f470.1697127817.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/r8192E_phy.c

@@ -920,9 +920,6 @@ void rtl92e_init_gain(struct net_device *dev, u8 Operation)
 		case IG_Backup:
 			initial_gain = SCAN_RX_INITIAL_GAIN;
 			BitMask = bMaskByte0;
-			if (dm_digtable.dig_algorithm ==
-			    DIG_ALGO_BY_FALSE_ALARM)
-				rtl92e_set_bb_reg(dev, UFWP, bMaskByte1, 0x8);
 			priv->initgain_backup.xaagccore1 =
 				 rtl92e_get_bb_reg(dev, rOFDM0_XAAGCCore1,
 						   BitMask);
@@ -947,10 +944,6 @@ void rtl92e_init_gain(struct net_device *dev, u8 Operation)
 			break;
 		case IG_Restore:
 			BitMask = 0x7f;
-			if (dm_digtable.dig_algorithm ==
-			    DIG_ALGO_BY_FALSE_ALARM)
-				rtl92e_set_bb_reg(dev, UFWP, bMaskByte1, 0x8);
-
 			rtl92e_set_bb_reg(dev, rOFDM0_XAAGCCore1, BitMask,
 					 (u32)priv->initgain_backup.xaagccore1);
 			rtl92e_set_bb_reg(dev, rOFDM0_XBAGCCore1, BitMask,
@@ -965,10 +958,6 @@ void rtl92e_init_gain(struct net_device *dev, u8 Operation)
 
 			rtl92e_set_tx_power(dev,
 					 priv->rtllib->current_network.channel);
-
-			if (dm_digtable.dig_algorithm ==
-			    DIG_ALGO_BY_FALSE_ALARM)
-				rtl92e_set_bb_reg(dev, UFWP, bMaskByte1, 0x1);
 			break;
 		}
 	}

drivers/staging/rtl8192e/rtl8192e/rtl_dm.c

@@ -913,8 +913,6 @@ static void _rtl92e_dm_dig_init(struct net_device *dev)
 {
 	struct r8192_priv *priv = rtllib_priv(dev);
 
-	dm_digtable.dig_algorithm = DIG_ALGO_BY_RSSI;
-
 	dm_digtable.dig_algorithm_switch = 0;
 
 	dm_digtable.dig_state		= DM_STA_DIG_MAX;
@@ -939,12 +937,7 @@ static void _rtl92e_dm_dig_init(struct net_device *dev)
 
 static void _rtl92e_dm_ctrl_initgain_byrssi(struct net_device *dev)
 {
-	if (dm_digtable.dig_algorithm == DIG_ALGO_BY_FALSE_ALARM)
-		_rtl92e_dm_ctrl_initgain_byrssi_false_alarm(dev);
-	else if (dm_digtable.dig_algorithm == DIG_ALGO_BY_RSSI)
 	_rtl92e_dm_ctrl_initgain_byrssi_driver(dev);
-	else
-		return;
 }
 
 /*-----------------------------------------------------------------------------

drivers/staging/rtl8192e/rtl8192e/rtl_dm.h

@@ -50,7 +50,6 @@
 
 /*------------------------------Define structure----------------------------*/
 struct dig_t {
-	u8		dig_algorithm;
 	u8		dig_algorithm_switch;
 
 	long		rssi_low_thresh;