From 93134df520f23f4e9998c425b8987edca7016817 Mon Sep 17 00:00:00 2001
From: Malcolm Priestley <tvboxspy@gmail.com>
Date: Tue, 4 Feb 2020 19:34:02 +0000
Subject: [PATCH] staging: vt6656: fix sign of rx_dbm to bb_pre_ed_rssi.
Git-commit: 93134df520f23f4e9998c425b8987edca7016817
Patch-mainline: v5.6-rc3
References: bsc#1051510

bb_pre_ed_rssi is an u8 rx_dm always returns negative signed
values add minus operator to always yield positive.

fixes issue where rx sensitivity is always set to maximum because
the unsigned numbers were always greater then 100.

Fixes: 63b9907f58f1 ("staging: vt6656: mac80211 conversion: create rx function.")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/aceac98c-6e69-3ce1-dfec-2bf27b980221@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/staging/vt6656/dpc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/vt6656/dpc.c
+++ b/drivers/staging/vt6656/dpc.c
@@ -140,7 +140,7 @@ int vnt_rx_data(struct vnt_private *priv
 
 	vnt_rf_rssi_to_dbm(priv, *rssi, &rx_dbm);
 
-	priv->bb_pre_ed_rssi = (u8)rx_dbm + 1;
+	priv->bb_pre_ed_rssi = (u8)-rx_dbm + 1;
 	priv->current_rssi = priv->bb_pre_ed_rssi;
 
 	frame = skb_data + 8;