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Commit 95483b69 authored by Emmanuel Grumbach's avatar Emmanuel Grumbach Committed by John W. Linville
Browse files

iwlwifi: remove dead code iwl4965_calc_db_from_ratio 



This patch removes iwl4965_calc_db_from_ratio which is dead code.

Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarZhu Yi <yi.zhu@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 91dbc5bd

drivers/net/wireless/iwlwifi/iwl4965-base.c

+0 −36
Original line number Diff line number Diff line
@@ -1597,42 +1597,6 @@ void iwl_rx_handle(struct iwl_priv *priv) 
	priv->rxq.read = i;

	iwl_rx_queue_restock(priv);

}

/* Convert linear signal-to-noise ratio into dB */

static u8 ratio2dB[100] = {

/*	 0   1   2   3   4   5   6   7   8   9 */

	 0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */

	20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */

	26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */

	29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */

	32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */

	34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */

	36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */

	37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */

	38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */

	39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */

};



/* Calculates a relative dB value from a ratio of linear

 *   (i.e. not dB) signal levels.

 * Conversion assumes that levels are voltages (20*log), not powers (10*log). */

int iwl4965_calc_db_from_ratio(int sig_ratio)

{

	/* 1000:1 or higher just report as 60 dB */

	if (sig_ratio >= 1000)

		return 60;



	/* 100:1 or higher, divide by 10 and use table,

	 *   add 20 dB to make up for divide by 10 */

	if (sig_ratio >= 100)

		return (20 + (int)ratio2dB[sig_ratio/10]);



	/* We shouldn't see this */

	if (sig_ratio < 1)

		return 0;



	/* Use table for ratios 1:1 - 99:1 */

	return (int)ratio2dB[sig_ratio];

}



#define PERFECT_RSSI (-20) /* dBm */

#define WORST_RSSI (-95)   /* dBm */