Merge tag 'wireless-2025-02-07' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless

Kalle Valo says:

====================
wireless fixes for v6.14-rc3

We have only one fix for ath12k and one fix for brcmfmac. Also this
will be my last pull request as I'm stepping down as wireless driver
maintainer.

* tag 'wireless-2025-02-07' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless:
  MAINTAINERS: wifi: remove Kalle
  MAINTAINERS: wifi: ath: remove Kalle
  wifi: brcmfmac: use random seed flag for BCM4355 and BCM4364 firmware
  wifi: ath12k: fix handling of 6 GHz rules
====================

Link: https://patch.msgid.link/20250207182957.23315C4CED1@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

2 files changed, 45 insertions, 17 deletions

diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c
index 4dd6cdf84571..abb510d235a5 100644
--- a/drivers/net/wireless/ath/ath12k/wmi.c
+++ b/drivers/net/wireless/ath/ath12k/wmi.c
@@ -4851,6 +4851,22 @@ static struct ath12k_reg_rule
 	return reg_rule_ptr;
 }
 
+static u8 ath12k_wmi_ignore_num_extra_rules(struct ath12k_wmi_reg_rule_ext_params *rule,
+					    u32 num_reg_rules)
+{
+	u8 num_invalid_5ghz_rules = 0;
+	u32 count, start_freq;
+
+	for (count = 0; count < num_reg_rules; count++) {
+		start_freq = le32_get_bits(rule[count].freq_info, REG_RULE_START_FREQ);
+
+		if (start_freq >= ATH12K_MIN_6G_FREQ)
+			num_invalid_5ghz_rules++;
+	}
+
+	return num_invalid_5ghz_rules;
+}
+
 static int ath12k_pull_reg_chan_list_ext_update_ev(struct ath12k_base *ab,
 						   struct sk_buff *skb,
 						   struct ath12k_reg_info *reg_info)
@@ -4861,6 +4877,7 @@ static int ath12k_pull_reg_chan_list_ext_update_ev(struct ath12k_base *ab,
 	u32 num_2g_reg_rules, num_5g_reg_rules;
 	u32 num_6g_reg_rules_ap[WMI_REG_CURRENT_MAX_AP_TYPE];
 	u32 num_6g_reg_rules_cl[WMI_REG_CURRENT_MAX_AP_TYPE][WMI_REG_MAX_CLIENT_TYPE];
+	u8 num_invalid_5ghz_ext_rules;
 	u32 total_reg_rules = 0;
 	int ret, i, j;
 
@@ -4954,20 +4971,6 @@ static int ath12k_pull_reg_chan_list_ext_update_ev(struct ath12k_base *ab,
 
 	memcpy(reg_info->alpha2, &ev->alpha2, REG_ALPHA2_LEN);
 
-	/* FIXME: Currently FW includes 6G reg rule also in 5G rule
-	 * list for country US.
-	 * Having same 6G reg rule in 5G and 6G rules list causes
-	 * intersect check to be true, and same rules will be shown
-	 * multiple times in iw cmd. So added hack below to avoid
-	 * parsing 6G rule from 5G reg rule list, and this can be
-	 * removed later, after FW updates to remove 6G reg rule
-	 * from 5G rules list.
-	 */
-	if (memcmp(reg_info->alpha2, "US", 2) == 0) {
-		reg_info->num_5g_reg_rules = REG_US_5G_NUM_REG_RULES;
-		num_5g_reg_rules = reg_info->num_5g_reg_rules;
-	}
-
 	reg_info->dfs_region = le32_to_cpu(ev->dfs_region);
 	reg_info->phybitmap = le32_to_cpu(ev->phybitmap);
 	reg_info->num_phy = le32_to_cpu(ev->num_phy);
@@ -5070,8 +5073,29 @@ static int ath12k_pull_reg_chan_list_ext_update_ev(struct ath12k_base *ab,
 		}
 	}
 
+	ext_wmi_reg_rule += num_2g_reg_rules;
+
+	/* Firmware might include 6 GHz reg rule in 5 GHz rule list
+	 * for few countries along with separate 6 GHz rule.
+	 * Having same 6 GHz reg rule in 5 GHz and 6 GHz rules list
+	 * causes intersect check to be true, and same rules will be
+	 * shown multiple times in iw cmd.
+	 * Hence, avoid parsing 6 GHz rule from 5 GHz reg rule list
+	 */
+	num_invalid_5ghz_ext_rules = ath12k_wmi_ignore_num_extra_rules(ext_wmi_reg_rule,
+								       num_5g_reg_rules);
+
+	if (num_invalid_5ghz_ext_rules) {
+		ath12k_dbg(ab, ATH12K_DBG_WMI,
+			   "CC: %s 5 GHz reg rules number %d from fw, %d number of invalid 5 GHz rules",
+			   reg_info->alpha2, reg_info->num_5g_reg_rules,
+			   num_invalid_5ghz_ext_rules);
+
+		num_5g_reg_rules = num_5g_reg_rules - num_invalid_5ghz_ext_rules;
+		reg_info->num_5g_reg_rules = num_5g_reg_rules;
+	}
+
 	if (num_5g_reg_rules) {
-		ext_wmi_reg_rule += num_2g_reg_rules;
 		reg_info->reg_rules_5g_ptr =
 			create_ext_reg_rules_from_wmi(num_5g_reg_rules,
 						      ext_wmi_reg_rule);
@@ -5083,7 +5107,12 @@ static int ath12k_pull_reg_chan_list_ext_update_ev(struct ath12k_base *ab,
 		}
 	}
 
-	ext_wmi_reg_rule += num_5g_reg_rules;
+	/* We have adjusted the number of 5 GHz reg rules above. But still those
+	 * many rules needs to be adjusted in ext_wmi_reg_rule.
+	 *
+	 * NOTE: num_invalid_5ghz_ext_rules will be 0 for rest other cases.
+	 */
+	ext_wmi_reg_rule += (num_5g_reg_rules + num_invalid_5ghz_ext_rules);
 
 	for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) {
 		reg_info->reg_rules_6g_ap_ptr[i] =
diff --git a/drivers/net/wireless/ath/ath12k/wmi.h b/drivers/net/wireless/ath/ath12k/wmi.h
index b6a197389277..45fe699ce8a5 100644
--- a/drivers/net/wireless/ath/ath12k/wmi.h
+++ b/drivers/net/wireless/ath/ath12k/wmi.h
@@ -4073,7 +4073,6 @@ struct ath12k_wmi_eht_rate_set_params {
 #define MAX_REG_RULES 10
 #define REG_ALPHA2_LEN 2
 #define MAX_6G_REG_RULES 5
-#define REG_US_5G_NUM_REG_RULES 4
 
 enum wmi_start_event_param {
 	WMI_VDEV_START_RESP_EVENT = 0,