tree: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master head: 076dc671ee9fa374e77c3d05925dafb75b23a74c commit: c179e91512cab01e83be35a60eaeda0f170a9101 [3/5] cfg80211: wext: don't use static struct config: x86_64-randconfig-x016-01221834 (attached as .config) compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025 reproduce: git checkout c179e91512cab01e83be35a60eaeda0f170a9101 # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): net//wireless/wext-compat.c: In function 'cfg80211_wireless_stats': >> net//wireless/wext-compat.c:1351:9: warning: function returns address of local variable [-Wreturn-local-addr] return &wstats; ^~~~~~~ vim +1351 net//wireless/wext-compat.c 8990646d2 Johannes Berg 2009-07-01 1289 8990646d2 Johannes Berg 2009-07-01 1290 /* Get wireless statistics. Called by /proc/net/wireless and by SIOCGIWSTATS */ 04b0c5c69 Johannes Berg 2011-07-15 1291 static struct iw_statistics *cfg80211_wireless_stats(struct net_device *dev) 8990646d2 Johannes Berg 2009-07-01 1292 { 8990646d2 Johannes Berg 2009-07-01 1293 struct wireless_dev *wdev = dev->ieee80211_ptr; f26cbf401 Zhao, Gang 2014-04-21 1294 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); c179e9151 Johannes Berg 2018-01-16 1295 struct iw_statistics wstats = {}; c179e9151 Johannes Berg 2018-01-16 1296 struct station_info sinfo = {}; c56c5714f Johannes Berg 2009-07-10 1297 u8 bssid[ETH_ALEN]; 8990646d2 Johannes Berg 2009-07-01 1298 8990646d2 Johannes Berg 2009-07-01 1299 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) 8990646d2 Johannes Berg 2009-07-01 1300 return NULL; 8990646d2 Johannes Berg 2009-07-01 1301 8990646d2 Johannes Berg 2009-07-01 1302 if (!rdev->ops->get_station) 8990646d2 Johannes Berg 2009-07-01 1303 return NULL; 8990646d2 Johannes Berg 2009-07-01 1304 c56c5714f Johannes Berg 2009-07-10 1305 /* Grab BSSID of current BSS, if any */ c56c5714f Johannes Berg 2009-07-10 1306 wdev_lock(wdev); c56c5714f Johannes Berg 2009-07-10 1307 if (!wdev->current_bss) { c56c5714f Johannes Berg 2009-07-10 1308 wdev_unlock(wdev); 8990646d2 Johannes Berg 2009-07-01 1309 return NULL; c56c5714f Johannes Berg 2009-07-10 1310 } c56c5714f Johannes Berg 2009-07-10 1311 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN); c56c5714f Johannes Berg 2009-07-10 1312 wdev_unlock(wdev); 8990646d2 Johannes Berg 2009-07-01 1313 e35e4d28b Hila Gonen 2012-06-27 1314 if (rdev_get_station(rdev, dev, bssid, &sinfo)) 8990646d2 Johannes Berg 2009-07-01 1315 return NULL; 8990646d2 Johannes Berg 2009-07-01 1316 8990646d2 Johannes Berg 2009-07-01 1317 switch (rdev->wiphy.signal_type) { 8990646d2 Johannes Berg 2009-07-01 1318 case CFG80211_SIGNAL_TYPE_MBM: 319090bf6 Johannes Berg 2014-11-17 1319 if (sinfo.filled & BIT(NL80211_STA_INFO_SIGNAL)) { 8990646d2 Johannes Berg 2009-07-01 1320 int sig = sinfo.signal; 8990646d2 Johannes Berg 2009-07-01 1321 wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED; 8990646d2 Johannes Berg 2009-07-01 1322 wstats.qual.updated |= IW_QUAL_QUAL_UPDATED; 8990646d2 Johannes Berg 2009-07-01 1323 wstats.qual.updated |= IW_QUAL_DBM; 8990646d2 Johannes Berg 2009-07-01 1324 wstats.qual.level = sig; 8990646d2 Johannes Berg 2009-07-01 1325 if (sig < -110) 8990646d2 Johannes Berg 2009-07-01 1326 sig = -110; 8990646d2 Johannes Berg 2009-07-01 1327 else if (sig > -40) 8990646d2 Johannes Berg 2009-07-01 1328 sig = -40; 8990646d2 Johannes Berg 2009-07-01 1329 wstats.qual.qual = sig + 110; 8990646d2 Johannes Berg 2009-07-01 1330 break; 8990646d2 Johannes Berg 2009-07-01 1331 } 8990646d2 Johannes Berg 2009-07-01 1332 case CFG80211_SIGNAL_TYPE_UNSPEC: 319090bf6 Johannes Berg 2014-11-17 1333 if (sinfo.filled & BIT(NL80211_STA_INFO_SIGNAL)) { 8990646d2 Johannes Berg 2009-07-01 1334 wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED; 8990646d2 Johannes Berg 2009-07-01 1335 wstats.qual.updated |= IW_QUAL_QUAL_UPDATED; 8990646d2 Johannes Berg 2009-07-01 1336 wstats.qual.level = sinfo.signal; 8990646d2 Johannes Berg 2009-07-01 1337 wstats.qual.qual = sinfo.signal; 8990646d2 Johannes Berg 2009-07-01 1338 break; 8990646d2 Johannes Berg 2009-07-01 1339 } 8990646d2 Johannes Berg 2009-07-01 1340 default: 8990646d2 Johannes Berg 2009-07-01 1341 wstats.qual.updated |= IW_QUAL_LEVEL_INVALID; 8990646d2 Johannes Berg 2009-07-01 1342 wstats.qual.updated |= IW_QUAL_QUAL_INVALID; 8990646d2 Johannes Berg 2009-07-01 1343 } 8990646d2 Johannes Berg 2009-07-01 1344 8990646d2 Johannes Berg 2009-07-01 1345 wstats.qual.updated |= IW_QUAL_NOISE_INVALID; 319090bf6 Johannes Berg 2014-11-17 1346 if (sinfo.filled & BIT(NL80211_STA_INFO_RX_DROP_MISC)) 5a5c731aa Ben Greear 2010-10-07 1347 wstats.discard.misc = sinfo.rx_dropped_misc; 319090bf6 Johannes Berg 2014-11-17 1348 if (sinfo.filled & BIT(NL80211_STA_INFO_TX_FAILED)) 5a5c731aa Ben Greear 2010-10-07 1349 wstats.discard.retries = sinfo.tx_failed; 8990646d2 Johannes Berg 2009-07-01 1350 8990646d2 Johannes Berg 2009-07-01 @1351 return &wstats; 8990646d2 Johannes Berg 2009-07-01 1352 } 562e48226 Johannes Berg 2009-07-27 1353 :::::: The code at line 1351 was first introduced by commit :::::: 8990646d2fafeacfacba4a4b1073a4216662089a cfg80211: implement get_wireless_stats :::::: TO: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> :::::: CC: John W. Linville <linville@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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