Hi Stephen, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 9c54130cd25528028b2d38f6ada0c79e92210390 commit: 4a55fb864f87cabddd417181e6542bd1d90fe179 [9893/10090] Merge remote-tracking branch 'jc_docs/docs-next' config: x86_64-randconfig-a001-20210326 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a46f59a747a7273cc439efaf3b4f98d8b63d2f20) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=4a55fb864f87cabddd417181e6542bd1d90fe179 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 4a55fb864f87cabddd417181e6542bd1d90fe179 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/hid/hid-thrustmaster.c:3: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * When connected to the machine, the Thrustmaster wheels appear as drivers/hid/hid-thrustmaster.c:26: warning: cannot understand function prototype: 'const u8 setup_0[] = ' drivers/hid/hid-thrustmaster.c:49: warning: cannot understand function prototype: 'struct tm_wheel_info ' drivers/hid/hid-thrustmaster.c:62: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Known wheels. drivers/hid/hid-thrustmaster.c:76: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * This structs contains (in little endian) the response data drivers/hid/hid-thrustmaster.c:143: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * On some setups initializing the T300RS crashes the kernel, drivers/hid/hid-thrustmaster.c:202: warning: Function parameter or member 'urb' not described in 'thrustmaster_model_handler' drivers/hid/hid-thrustmaster.c:202: warning: expecting prototype for Called by the USB subsystem when the wheel responses to our request(). Prototype was for thrustmaster_model_handler() instead drivers/hid/hid-thrustmaster.c:265: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Function called by HID when a hid Thrustmaster FFB wheel is connected to the host. vim +3 drivers/hid/hid-thrustmaster.c c49c33637802a2 Dario Pagani 2021-01-31 @3 * When connected to the machine, the Thrustmaster wheels appear as c49c33637802a2 Dario Pagani 2021-01-31 4 * a «generic» hid gamepad called "Thrustmaster FFB Wheel". c49c33637802a2 Dario Pagani 2021-01-31 5 * c49c33637802a2 Dario Pagani 2021-01-31 6 * When in this mode not every functionality of the wheel, like the force feedback, c49c33637802a2 Dario Pagani 2021-01-31 7 * are available. To enable all functionalities of a Thrustmaster wheel we have to send c49c33637802a2 Dario Pagani 2021-01-31 8 * to it a specific USB CONTROL request with a code different for each wheel. c49c33637802a2 Dario Pagani 2021-01-31 9 * c49c33637802a2 Dario Pagani 2021-01-31 10 * This driver tries to understand which model of Thrustmaster wheel the generic c49c33637802a2 Dario Pagani 2021-01-31 11 * "Thrustmaster FFB Wheel" really is and then sends the appropriate control code. c49c33637802a2 Dario Pagani 2021-01-31 12 * c49c33637802a2 Dario Pagani 2021-01-31 13 * Copyright (c) 2020-2021 Dario Pagani <dario.pagani.146+linuxk@xxxxxxxxx> c49c33637802a2 Dario Pagani 2021-01-31 14 * Copyright (c) 2020-2021 Kim Kuparinen <kimi.h.kuparinen@xxxxxxxxx> c49c33637802a2 Dario Pagani 2021-01-31 15 */ c49c33637802a2 Dario Pagani 2021-01-31 16 #include <linux/hid.h> c49c33637802a2 Dario Pagani 2021-01-31 17 #include <linux/usb.h> c49c33637802a2 Dario Pagani 2021-01-31 18 #include <linux/input.h> c49c33637802a2 Dario Pagani 2021-01-31 19 #include <linux/slab.h> c49c33637802a2 Dario Pagani 2021-01-31 20 #include <linux/module.h> c49c33637802a2 Dario Pagani 2021-01-31 21 :::::: The code at line 3 was first introduced by commit :::::: c49c33637802a2c6957a78119eb8be3b055dd9e9 HID: support for initialization of some Thrustmaster wheels :::::: TO: Dario Pagani <dario.pagani.146@xxxxxxxxx> :::::: CC: Jiri Kosina <jkosina@xxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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