[PATCH 1/2] wifi: iwlegacy: Remove unused il3945_calc_db_from_ratio

[linux@treblig.org]

From: "Dr. David Alan Gilbert" <linux@treblig.org>

The last use of il3945_calc_db_from_ratio() was removed in 2010 by
commit ed1b6e99b5e6 ("iwlwifi: remove noise reporting")
when it was still called iwl3945_calc_db_from_ratio().

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
---
 .../net/wireless/intel/iwlegacy/3945-mac.c    | 38 -------------------
 drivers/net/wireless/intel/iwlegacy/3945.h    |  1 -
 2 files changed, 39 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlegacy/3945-mac.c b/drivers/net/wireless/intel/iwlegacy/3945-mac.c
index 74fc76c00ebc..4013443698a2 100644
--- a/drivers/net/wireless/intel/iwlegacy/3945-mac.c
+++ b/drivers/net/wireless/intel/iwlegacy/3945-mac.c
@@ -1127,44 +1127,6 @@ il3945_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
 	rxq->rb_stts = NULL;
 }
 
-/* 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
-il3945_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];
-}
-
 /*
  * il3945_rx_handle - Main entry function for receiving responses from uCode
  *
diff --git a/drivers/net/wireless/intel/iwlegacy/3945.h b/drivers/net/wireless/intel/iwlegacy/3945.h
index ffbe11902628..fb1e33c89d0e 100644
--- a/drivers/net/wireless/intel/iwlegacy/3945.h
+++ b/drivers/net/wireless/intel/iwlegacy/3945.h
@@ -173,7 +173,6 @@ struct il3945_ibss_seq {
  * for use by iwl-*.c
  *
  *****************************************************************************/
-int il3945_calc_db_from_ratio(int sig_ratio);
 void il3945_rx_replenish(void *data);
 void il3945_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq);
 unsigned int il3945_fill_beacon_frame(struct il_priv *il,
-- 
2.47.1