rtw89: remove cch_by_bw which is not used

Originally, cch_by_bw recorded center channels of each available
bandwidths under current bandwidth. And the plan was to iterate
cch_by_bw as parameters to query other configurations. However,
we have not used it for the time being. Keeping it will disturb
the follow-up things, such as bandwidth 160 MHz, so we remove it
for now. If it's really needed at some point, we will redesign it.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20211201080901.12125-1-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/core.c

@@ -143,20 +143,15 @@ static void rtw89_get_channel_params(struct cfg80211_chan_def *chandef,
 {
 	struct ieee80211_channel *channel = chandef->chan;
 	enum nl80211_chan_width width = chandef->width;
-	u8 *cch_by_bw = chan_param->cch_by_bw;
 	u32 primary_freq, center_freq;
 	u8 center_chan;
 	u8 bandwidth = RTW89_CHANNEL_WIDTH_20;
 	u8 primary_chan_idx = 0;
-	u8 i;
 
 	center_chan = channel->hw_value;
 	primary_freq = channel->center_freq;
 	center_freq = chandef->center_freq1;
 
-	/* assign the center channel used while 20M bw is selected */
-	cch_by_bw[RTW89_CHANNEL_WIDTH_20] = channel->hw_value;
-
 	switch (width) {
 	case NL80211_CHAN_WIDTH_20_NOHT:
 	case NL80211_CHAN_WIDTH_20:
@@ -183,10 +178,6 @@ static void rtw89_get_channel_params(struct cfg80211_chan_def *chandef,
 				primary_chan_idx = RTW89_SC_20_UPMOST;
 				center_chan -= 6;
 			}
-			/* assign the center channel used
-			 * while 40M bw is selected
-			 */
-			cch_by_bw[RTW89_CHANNEL_WIDTH_40] = center_chan + 4;
 		} else {
 			if (center_freq - primary_freq == 10) {
 				primary_chan_idx = RTW89_SC_20_LOWER;
@@ -195,10 +186,6 @@ static void rtw89_get_channel_params(struct cfg80211_chan_def *chandef,
 				primary_chan_idx = RTW89_SC_20_LOWEST;
 				center_chan += 6;
 			}
-			/* assign the center channel used
-			 * while 40M bw is selected
-			 */
-			cch_by_bw[RTW89_CHANNEL_WIDTH_40] = center_chan - 4;
 		}
 		break;
 	default:
@@ -210,12 +197,6 @@ static void rtw89_get_channel_params(struct cfg80211_chan_def *chandef,
 	chan_param->primary_chan = channel->hw_value;
 	chan_param->bandwidth = bandwidth;
 	chan_param->pri_ch_idx = primary_chan_idx;
-
-	/* assign the center channel used while current bw is selected */
-	cch_by_bw[bandwidth] = center_chan;
-
-	for (i = bandwidth + 1; i <= RTW89_MAX_CHANNEL_WIDTH; i++)
-		cch_by_bw[i] = 0;
 }
 
 void rtw89_set_channel(struct rtw89_dev *rtwdev)
@@ -228,7 +209,6 @@ void rtw89_set_channel(struct rtw89_dev *rtwdev)
 	u8 center_chan, bandwidth;
 	u8 band_type;
 	bool band_changed;
-	u8 i;
 
 	rtw89_get_channel_params(&hw->conf.chandef, &ch_param);
 	if (WARN(ch_param.center_chan == 0, "Invalid channel\n"))
@@ -261,9 +241,6 @@ void rtw89_set_channel(struct rtw89_dev *rtwdev)
 		break;
 	}
 
-	for (i = RTW89_CHANNEL_WIDTH_20; i <= RTW89_MAX_CHANNEL_WIDTH; i++)
-		hal->cch_by_bw[i] = ch_param.cch_by_bw[i];
-
 	rtw89_chip_set_channel_prepare(rtwdev, &bak);
 
 	chip->ops->set_channel(rtwdev, &ch_param);

drivers/net/wireless/realtek/rtw89/core.h

@@ -547,7 +547,6 @@ enum rtw89_ps_mode {
 	RTW89_PS_MODE_PWR_GATED	= 3,
 };
 
-#define RTW89_MAX_CHANNEL_WIDTH RTW89_CHANNEL_WIDTH_80
 #define RTW89_2G_BW_NUM (RTW89_CHANNEL_WIDTH_40 + 1)
 #define RTW89_5G_BW_NUM (RTW89_CHANNEL_WIDTH_80 + 1)
 #define RTW89_PPE_BW_NUM (RTW89_CHANNEL_WIDTH_80 + 1)
@@ -574,7 +573,6 @@ struct rtw89_channel_params {
 	u8 primary_chan;
 	u8 bandwidth;
 	u8 pri_ch_idx;
-	u8 cch_by_bw[RTW89_MAX_CHANNEL_WIDTH + 1];
 };
 
 struct rtw89_channel_help_params {
@@ -2354,10 +2352,6 @@ struct rtw89_hal {
 	enum rtw89_subband current_subband;
 	u8 current_band_width;
 	u8 current_band_type;
-	/* center channel for different available bandwidth,
-	 * val of (bw > current_band_width) is invalid
-	 */
-	u8 cch_by_bw[RTW89_MAX_CHANNEL_WIDTH + 1];
 	u32 sw_amsdu_max_size;
 	u32 antenna_tx;
 	u32 antenna_rx;