[v2] ath10k: fix band_center_freq handling for VHT160 in recent firmwares
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Message ID 20180704095444.662-1-s.gottschall@dd-wrt.com
State New
Headers show

Commit Message

Sebastian Gottschall July 4, 2018, 9:54 a.m. UTC
From: Sebastian Gottschall <s.gottschall@dd-wrt.com>

Starting with firmware 10.4.3.4.x series QCA changed the handling of the channel property band_center_freq1 and band_center_freq2 in vht160 operation mode
likelly for backward compatibility with vht80 only capable clients.
This patch adjusts the handling to get vht160 to work again with official QCA firmwares newer than 3.3
consider that this patch will not work with older firmwares anymore. to avoid undefined behaviour we disable vht160 capability for outdated firmwares

Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>

v2: fix trailing whitespace issue and fix some typos within the commit note
---
 drivers/net/wireless/ath/ath10k/mac.c |  7 -------
 drivers/net/wireless/ath/ath10k/wmi.c | 11 ++++++++---
 2 files changed, 8 insertions(+), 10 deletions(-)

Patch
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diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 95243b48a179..46885b915eb7 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -4442,13 +4442,6 @@  static struct ieee80211_sta_vht_cap ath10k_create_vht_cap(struct ath10k *ar)
 		vht_cap.cap |= val;
 	}
 
-	/* Currently the firmware seems to be buggy, don't enable 80+80
-	 * mode until that's resolved.
-	 */
-	if ((ar->vht_cap_info & IEEE80211_VHT_CAP_SHORT_GI_160) &&
-	    (ar->vht_cap_info & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) == 0)
-		vht_cap.cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
-
 	mcs_map = 0;
 	for (i = 0; i < 8; i++) {
 		if ((i < ar->num_rf_chains) && (ar->cfg_tx_chainmask & BIT(i)))
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 877249ac6fd4..e2adf34effb3 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -1677,13 +1677,18 @@  void ath10k_wmi_put_wmi_channel(struct wmi_channel *ch,
 		flags |= WMI_CHAN_FLAG_HT40_PLUS;
 	if (arg->chan_radar)
 		flags |= WMI_CHAN_FLAG_DFS;
-
+	ch->band_center_freq2 = 0;
 	ch->mhz = __cpu_to_le32(arg->freq);
 	ch->band_center_freq1 = __cpu_to_le32(arg->band_center_freq1);
 	if (arg->mode == MODE_11AC_VHT80_80)
 		ch->band_center_freq2 = __cpu_to_le32(arg->band_center_freq2);
-	else
-		ch->band_center_freq2 = 0;
+	if (arg->mode == MODE_11AC_VHT160)  {
+		if (arg->freq < arg->band_center_freq1)
+			ch->band_center_freq1 = __cpu_to_le32(arg->band_center_freq1 - 40);
+		else
+			ch->band_center_freq1 = __cpu_to_le32(arg->band_center_freq1 + 40);
+		ch->band_center_freq2 = __cpu_to_le32(arg->band_center_freq1);
+	}
 	ch->min_power = arg->min_power;
 	ch->max_power = arg->max_power;
 	ch->reg_power = arg->max_reg_power;