[PATCH] wifi: mt76: mt7925: add regulatory wiphy self manager support

[kernel test robot]

Hi JB,

kernel test robot noticed the following build errors:

[auto build test ERROR on wireless-next/main]
[also build test ERROR on wireless/main linus/master v7.1-rc6 next-20260602]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/JB-Tsai/wifi-mt76-mt7925-add-regulatory-wiphy-self-manager-support/20260603-155908
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20260603075331.1234691-1-jb.tsai%40mediatek.com
patch subject: [PATCH] wifi: mt76: mt7925: add regulatory wiphy self manager support
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20260603/202606032205.iaSDVq2Z-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project f43d6834093b19baf79beda8c0337ab020ac5f17)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260603/202606032205.iaSDVq2Z-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606032205.iaSDVq2Z-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/net/wireless/mediatek/mt76/mt7925/regd.c:361:43: error: passing 'const struct ieee80211_regdomain *' to parameter of type 'struct ieee80211_regdomain *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
     361 |                 return regulatory_set_wiphy_regd(wiphy, &mt7925_regd_ww);
         |                                                         ^~~~~~~~~~~~~~~
   include/net/cfg80211.h:8082:38: note: passing argument to parameter 'rd' here
    8082 |                               struct ieee80211_regdomain *rd);
         |                                                           ^
   1 error generated.


vim +361 drivers/net/wireless/mediatek/mt76/mt7925/regd.c

   286	
   287	int mt7925_regd_update(struct mt792x_phy *phy, char *alpha2)
   288	{
   289		struct wiphy *wiphy = phy->mt76->hw->wiphy;
   290		struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
   291		struct mt792x_dev *dev = mt792x_hw_dev(hw);
   292		struct mt7925_regd_rule *mt7925_rule;
   293		struct mt76_dev *mdev = &dev->mt76;
   294		struct ieee80211_regdomain *regd;
   295		struct ieee80211_reg_rule *rule;
   296		struct mt7925_regd_rule_ev *ev;
   297		int i, num_of_rules = 0;
   298		struct sk_buff *skb;
   299		int ret = 0;
   300	
   301		if (dev->hw_full_reset)
   302			return 0;
   303	
   304		if (!MT7925_REGD_SUPPORTED(phy))
   305			return -EOPNOTSUPP;
   306	
   307		mt792x_mutex_acquire(dev);
   308		skb = mt7925_regd_query_regdb(phy, alpha2);
   309		mt792x_mutex_release(dev);
   310	
   311		if (!skb)
   312			return -EINVAL;
   313	
   314		ev = (struct mt7925_regd_rule_ev *)(skb->data + 4);
   315		num_of_rules = le32_to_cpu(ev->n_reg_rules);
   316	
   317		if (!num_of_rules ||
   318			WARN_ON_ONCE(num_of_rules > NL80211_MAX_SUPP_REG_RULES)) {
   319			ret = -EINVAL;
   320			goto err;
   321		}
   322	
   323		regd = kzalloc(struct_size(regd, reg_rules, num_of_rules), GFP_KERNEL);
   324		if (!regd) {
   325			ret = -ENOMEM;
   326			goto err;
   327		}
   328	
   329		for (i = 0; i < num_of_rules; i++) {
   330			mt7925_rule = &ev->reg_rule[i];
   331			rule = &regd->reg_rules[i];
   332	
   333			rule->freq_range.start_freq_khz =
   334						MHZ_TO_KHZ(mt7925_rule->start_freq);
   335			rule->freq_range.end_freq_khz =
   336						MHZ_TO_KHZ(mt7925_rule->end_freq);
   337			rule->freq_range.max_bandwidth_khz =
   338						MHZ_TO_KHZ(mt7925_rule->max_bw);
   339			/* not used by fw */
   340			rule->power_rule.max_antenna_gain = DBI_TO_MBI(6);
   341			rule->power_rule.max_eirp = DBM_TO_MBM(22);
   342			rule->flags = mt7925_rule->flags;
   343		}
   344	
   345		regd->n_reg_rules = num_of_rules;
   346		regd->dfs_region = ev->dfs_region;
   347	
   348		memcpy(regd->alpha2, alpha2, 2);
   349		memcpy(mdev->alpha2, alpha2, 2);
   350	
   351		dev->regd_change = true;
   352		mt7925_mcu_regd_update(dev, alpha2, ENVIRON_ANY);
   353	
   354		ret = regulatory_set_wiphy_regd(wiphy, regd);
   355	
   356		kfree(regd);
   357	err:
   358		dev_kfree_skb(skb);
   359	
   360		if (ret < 0)
 > 361			return regulatory_set_wiphy_regd(wiphy, &mt7925_regd_ww);
   362	
   363		return ret;
   364	}
   365	EXPORT_SYMBOL_GPL(mt7925_regd_update);
   366	

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