tree: https://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git for-kernelci head: 565ffffee3366a1a9bc4fc040088f1b57bd6c6f9 commit: 7e7def15fa4bc9d6a2fa3d1d379286591c249381 [5/9] platform/chrome: cros_ec_typec: Add USB mux control config: arc-allyesconfig (attached as .config) compiler: arc-elf-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 git checkout 7e7def15fa4bc9d6a2fa3d1d379286591c249381 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>, old ones prefixed by <<): 364 | int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num, | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/cros_typec_configure_mux +364 drivers/platform/chrome/cros_ec_typec.c 363 365 uint8_t mux_flags) 366 { 367 struct cros_typec_port *port = typec->ports[port_num]; 368 enum typec_orientation orientation; 369 int ret; 370 371 if (!port->partner) 372 return 0; 373 374 if (mux_flags & USB_PD_MUX_POLARITY_INVERTED) 375 orientation = TYPEC_ORIENTATION_REVERSE; 376 else 377 orientation = TYPEC_ORIENTATION_NORMAL; 378 379 ret = typec_switch_set(port->ori_sw, orientation); 380 if (ret) 381 return ret; 382 383 port->state.alt = NULL; 384 port->state.mode = TYPEC_STATE_USB; 385 386 if (mux_flags & USB_PD_MUX_SAFE_MODE) 387 ret = cros_typec_usb_safe_state(port); 388 else if (mux_flags & USB_PD_MUX_USB_ENABLED) 389 ret = typec_mux_set(port->mux, &port->state); 390 else { 391 dev_info(typec->dev, 392 "Unsupported mode requested, mux flags: %x\n", 393 mux_flags); 394 ret = -ENOTSUPP; 395 } 396 397 return ret; 398 } 399 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org