[PATCH] wifi: ath11k: fix QCN6122 UNII-3 channels 149-165 disabled

[autumnshiu]

The QCN6122 firmware reports high_5ghz_chan without the UNII-3 band
(5725-5850 MHz, channels 149-165). ath11k_mac_setup_channels_rates()
passes this value to ath11k_mac_update_ch_list(), which marks every
channel above high_5ghz_chan as IEEE80211_CHAN_DISABLED.

As a result channels 149-165 (including 5745 MHz, channel 149) are
disabled on QCN6122 even though the board-2.bin BDF contains the
UNII-3 frequencies and the regulatory domain covers them. This also
truncates the wpa_supplicant freq_list, so a 5 GHz STA can never
scan or associate on those channels.

Clamp high_5ghz_chan to the standard 5.8 GHz upper bound (5825 MHz,
channel 165) for QCN6122, matching what the hardware and BDF
actually support.

Tested on a CMCC PZ-L8 (IPQ5018 + QCN6122) with the 5 GHz radio as
STA and AP on channel 149/HE80.

Patch authored by V4Pro (DeepSeek Harness), tested and submitted by
autumnshiu.

Signed-off-by: autumnshiu <autumnshiu at foxmail.com>
---
 drivers/net/wireless/ath/ath11k/mac.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -10172,6 +10172,15 @@ static int ath11k_mac_setup_channels_rates(struct ath11k *ar,
 	reg_cap = &ar->ab->hal_reg_cap[ar->pdev_idx];
 	temp_reg_cap = reg_cap;
 
+	/* QCN6122 firmware omits the UNII-3 band (5725-5850 MHz, channels
+	 * 149-165) from high_5ghz_chan, which makes the driver mark those
+	 * channels IEEE80211_CHAN_DISABLED. Clamp it to the standard 5.8 GHz
+	 * upper bound so channels 149-165 remain usable.
+	 */
+	if (ar->ab->hw_rev == ATH11K_HW_QCN6122_HW10 &&
+	    reg_cap->high_5ghz_chan < 5825)
+		reg_cap->high_5ghz_chan = 5825;
+
 	if (supported_bands & WMI_HOST_WLAN_2G_CAP) {
 		channels = kmemdup(ath11k_2ghz_channels,
 				   sizeof(ath11k_2ghz_channels),