Re: [RFC PATCH 5/6] wifi: mac80211: use wiphy locked debugfs helpers for agg_status

Re: [RFC PATCH 5/6] wifi: mac80211: use wiphy locked debugfs helpers for agg_status

[kernel test robot]

Hi Johannes,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on driver-core/driver-core-testing]
[also build test ERROR on driver-core/driver-core-next driver-core/driver-core-linus wireless-next/main wireless/main linus/master v6.6 next-20231110]
[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/Johannes-Berg/debugfs-fix-automount-d_fsdata-usage/20231110-054024
base:   driver-core/driver-core-testing
patch link:    https://lore.kernel.org/r/20231109222251.186dcaf8bdcc.Id4251db174cdd42519a5ef19cbb08d7ed8f65397%40changeid
patch subject: [RFC PATCH 5/6] wifi: mac80211: use wiphy locked debugfs helpers for agg_status
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20231110/202311101917.1895GcFy-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231110/202311101917.1895GcFy-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311101917.1895GcFy-lkp@intel.com/

All errors (new ones prefixed by >>):

>> net/mac80211/debugfs_sta.c:368:8: error: call to undeclared function 'wiphy_locked_debugfs_read'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           ret = wiphy_locked_debugfs_read(wiphy, file, buf, bufsz,
                 ^
>> net/mac80211/debugfs_sta.c:445:9: error: call to undeclared function 'wiphy_locked_debugfs_write'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           return wiphy_locked_debugfs_write(wiphy, file, _buf, sizeof(_buf),
                  ^
   2 errors generated.


vim +/wiphy_locked_debugfs_read +368 net/mac80211/debugfs_sta.c

   355	
   356	static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
   357					   size_t count, loff_t *ppos)
   358	{
   359		struct sta_info *sta = file->private_data;
   360		struct wiphy *wiphy = sta->local->hw.wiphy;
   361		size_t bufsz = 71 + IEEE80211_NUM_TIDS * 40;
   362		char *buf = kmalloc(bufsz, GFP_KERNEL);
   363		ssize_t ret;
   364	
   365		if (!buf)
   366			return -ENOMEM;
   367	
 > 368		ret = wiphy_locked_debugfs_read(wiphy, file, buf, bufsz,
   369						userbuf, count, ppos,
   370						sta_agg_status_do_read, sta);
   371		kfree(buf);
   372	
   373		return ret;
   374	}
   375	
   376	static ssize_t sta_agg_status_do_write(struct wiphy *wiphy, struct file *file,
   377					       char *buf, size_t count, void *data)
   378	{
   379		struct sta_info *sta = data;
   380		bool start, tx;
   381		unsigned long tid;
   382		char *pos = buf;
   383		int ret, timeout = 5000;
   384	
   385		buf = strsep(&pos, " ");
   386		if (!buf)
   387			return -EINVAL;
   388	
   389		if (!strcmp(buf, "tx"))
   390			tx = true;
   391		else if (!strcmp(buf, "rx"))
   392			tx = false;
   393		else
   394			return -EINVAL;
   395	
   396		buf = strsep(&pos, " ");
   397		if (!buf)
   398			return -EINVAL;
   399		if (!strcmp(buf, "start")) {
   400			start = true;
   401			if (!tx)
   402				return -EINVAL;
   403		} else if (!strcmp(buf, "stop")) {
   404			start = false;
   405		} else {
   406			return -EINVAL;
   407		}
   408	
   409		buf = strsep(&pos, " ");
   410		if (!buf)
   411			return -EINVAL;
   412		if (sscanf(buf, "timeout=%d", &timeout) == 1) {
   413			buf = strsep(&pos, " ");
   414			if (!buf || !tx || !start)
   415				return -EINVAL;
   416		}
   417	
   418		ret = kstrtoul(buf, 0, &tid);
   419		if (ret || tid >= IEEE80211_NUM_TIDS)
   420			return -EINVAL;
   421	
   422		if (tx) {
   423			if (start)
   424				ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
   425								    timeout);
   426			else
   427				ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
   428		} else {
   429			__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
   430						       3, true);
   431			ret = 0;
   432		}
   433	
   434		return ret ?: count;
   435	}
   436	
   437	static ssize_t sta_agg_status_write(struct file *file,
   438					    const char __user *userbuf,
   439					    size_t count, loff_t *ppos)
   440	{
   441		struct sta_info *sta = file->private_data;
   442		struct wiphy *wiphy = sta->local->hw.wiphy;
   443		char _buf[26];
   444	
 > 445		return wiphy_locked_debugfs_write(wiphy, file, _buf, sizeof(_buf),
   446						  userbuf, count,
   447						  sta_agg_status_do_write, sta);
   448	}
   449	STA_OPS_RW(agg_status);
   450	

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