From d6f2746691cb10e484f15ab9e44e2cc2ccf9bd86 Mon Sep 17 00:00:00 2001
From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Date: Sat, 15 Jan 2022 00:16:44 +0000
Subject: [PATCH] wcn36xx: Track the band and channel we are tuned to
Git-commit: d6f2746691cb10e484f15ab9e44e2cc2ccf9bd86
Patch-mainline: v5.18-rc1
References: bsc#1206451

Track the band and channel we are currently tuned to by way of pointers to
the standard structures that describe them both embedded within the driver.

Tracking of the pair makes it much easier when implementing
ieee80211_ops->get_survey to return quickly captured metrics for the
currently tuned channel.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220115001646.3981501-3-bryan.odonoghue@linaro.org
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/ath/wcn36xx/main.c    | 27 ++++++++++++++++++++++
 drivers/net/wireless/ath/wcn36xx/wcn36xx.h |  3 +++
 2 files changed, 30 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index bd334a302057..bb674b725873 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -392,11 +392,38 @@ static void wcn36xx_change_opchannel(struct wcn36xx *wcn, int ch)
 {
 	struct ieee80211_vif *vif = NULL;
 	struct wcn36xx_vif *tmp;
+	struct ieee80211_supported_band *band;
+	struct ieee80211_channel *channel;
+	int i, j;
+
+	for (i = 0; i < ARRAY_SIZE(wcn->hw->wiphy->bands); i++) {
+		band = wcn->hw->wiphy->bands[i];
+		if (!band)
+			break;
+		for (j = 0; j < band->n_channels; j++) {
+			if (HW_VALUE_CHANNEL(band->channels[j].hw_value) == ch) {
+				channel = &band->channels[j];
+				break;
+			}
+		}
+		if (channel)
+			break;
+	}
+
+	if (!channel) {
+		wcn36xx_err("Cannot tune to channel %d\n", ch);
+		return;
+	}
+
+	wcn->band = band;
+	wcn->channel = channel;
 
 	list_for_each_entry(tmp, &wcn->vif_list, list) {
 		vif = wcn36xx_priv_to_vif(tmp);
 		wcn36xx_smd_switch_channel(wcn, vif, ch);
 	}
+
+	return;
 }
 
 static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed)
diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index fbd0558c2c19..dd2570e46808 100644
--- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
@@ -281,6 +281,9 @@ struct wcn36xx {
 	/* Debug file system entry */
 	struct wcn36xx_dfs_entry    dfs;
 #endif /* CONFIG_WCN36XX_DEBUGFS */
+
+	struct ieee80211_supported_band *band;
+	struct ieee80211_channel *channel;
 };
 
 static inline bool wcn36xx_is_fw_version(struct wcn36xx *wcn,
-- 
2.35.3