tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: e864f43593ccf9180c61738abdf1c1dde091367d commit: 486c32325caac9ebd5ab6da9bf27413e88592ee9 [1714/9999] carl9170: fix misuse of device driver API config: m68k-randconfig-r015-20201217 (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.19.y git checkout 486c32325caac9ebd5ab6da9bf27413e88592ee9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/net/wireless/ath/carl9170/wlan.h:42, from drivers/net/wireless/ath/carl9170/carl9170.h:57, from drivers/net/wireless/ath/carl9170/usb.c:47: drivers/net/wireless/ath/carl9170/fwcmd.h:243:2: warning: alignment 1 of 'union <anonymous>' is less than 4 [-Wpacked-not-aligned] 243 | } __packed; | ^ drivers/net/wireless/ath/carl9170/fwcmd.h:243:2: warning: alignment 1 of 'union <anonymous>' is less than 4 [-Wpacked-not-aligned] In file included from drivers/net/wireless/ath/carl9170/carl9170.h:57, from drivers/net/wireless/ath/carl9170/usb.c:47: drivers/net/wireless/ath/carl9170/wlan.h:373:1: warning: alignment 1 of 'struct ar9170_rx_frame_single' is less than 2 [-Wpacked-not-aligned] 373 | } __packed; | ^ drivers/net/wireless/ath/carl9170/wlan.h:379:1: warning: alignment 1 of 'struct ar9170_rx_frame_head' is less than 2 [-Wpacked-not-aligned] 379 | } __packed; | ^ drivers/net/wireless/ath/carl9170/wlan.h:384:1: warning: alignment 1 of 'struct ar9170_rx_frame_middle' is less than 2 [-Wpacked-not-aligned] 384 | } __packed; | ^ drivers/net/wireless/ath/carl9170/wlan.h:390:1: warning: alignment 1 of 'struct ar9170_rx_frame_tail' is less than 2 [-Wpacked-not-aligned] 390 | } __packed; | ^ drivers/net/wireless/ath/carl9170/usb.c: In function 'carl9170_usb_disconnect': 1110 | struct usb_device *udev; | ^~~~ In file included from drivers/net/wireless/ath/carl9170/usb.c:47: At top level: drivers/net/wireless/ath/carl9170/carl9170.h:71:17: warning: 'ar9170_qmap' defined but not used [-Wunused-const-variable=] 71 | static const u8 ar9170_qmap[__AR9170_NUM_TXQ] = { 3, 2, 1, 0 }; | ^~~~~~~~~~~ vim +/udev +1110 drivers/net/wireless/ath/carl9170/usb.c a84fab3cbfdc427 Christian Lamparter 2010-09-06 1106 a84fab3cbfdc427 Christian Lamparter 2010-09-06 1107 static void carl9170_usb_disconnect(struct usb_interface *intf) a84fab3cbfdc427 Christian Lamparter 2010-09-06 1108 { a84fab3cbfdc427 Christian Lamparter 2010-09-06 1109 struct ar9170 *ar = usb_get_intfdata(intf); a84fab3cbfdc427 Christian Lamparter 2010-09-06 @1110 struct usb_device *udev; a84fab3cbfdc427 Christian Lamparter 2010-09-06 1111 a84fab3cbfdc427 Christian Lamparter 2010-09-06 1112 if (WARN_ON(!ar)) a84fab3cbfdc427 Christian Lamparter 2010-09-06 1113 return; a84fab3cbfdc427 Christian Lamparter 2010-09-06 1114 a84fab3cbfdc427 Christian Lamparter 2010-09-06 1115 udev = ar->udev; a84fab3cbfdc427 Christian Lamparter 2010-09-06 1116 wait_for_completion(&ar->fw_load_wait); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1117 a84fab3cbfdc427 Christian Lamparter 2010-09-06 1118 if (IS_INITIALIZED(ar)) { a84fab3cbfdc427 Christian Lamparter 2010-09-06 1119 carl9170_reboot(ar); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1120 carl9170_usb_stop(ar); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1121 } a84fab3cbfdc427 Christian Lamparter 2010-09-06 1122 a84fab3cbfdc427 Christian Lamparter 2010-09-06 1123 carl9170_usb_cancel_urbs(ar); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1124 carl9170_unregister(ar); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1125 a84fab3cbfdc427 Christian Lamparter 2010-09-06 1126 usb_set_intfdata(intf, NULL); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1127 a84fab3cbfdc427 Christian Lamparter 2010-09-06 1128 carl9170_release_firmware(ar); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1129 carl9170_free(ar); a84fab3cbfdc427 Christian Lamparter 2010-09-06 1130 } a84fab3cbfdc427 Christian Lamparter 2010-09-06 1131 :::::: The code at line 1110 was first introduced by commit :::::: a84fab3cbfdc427e7d366f1cc844f27b2084c26c carl9170: 802.11 rx/tx processing and usb backend :::::: TO: Christian Lamparter <chunkeey(a)googlemail.com&gt; :::::: CC: John W. Linville <linville(a)tuxdriver.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org