tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: 5bb9de8bcb18c38ea089a287b77944ef8ee71abd wilc1000: configure registers to handle chip wakeup sequence date: 7 weeks ago config: h8300-randconfig-r026-20211109 (attached as .config) compiler: h8300-linux-gcc (GCC) 11.2.0 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/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 5bb9de8bcb18c38ea089a287b77944ef8ee71abd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=h8300 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 >>): drivers/net/wireless/microchip/wilc1000/wlan.c: In function 'chip_wakeup': 620 | u32 to_host_from_fw_reg, to_host_from_fw_bit; | ^~~~~~~~~~~~~~~~~~~ 620 | u32 to_host_from_fw_reg, to_host_from_fw_bit; | ^~~~~~~~~~~~~~~~~~~ vim +/to_host_from_fw_bit +620 drivers/net/wireless/microchip/wilc1000/wlan.c 613 614 void chip_wakeup(struct wilc *wilc) 615 { 616 u32 ret = 0; 617 u32 clk_status_val = 0, trials = 0; 618 u32 wakeup_reg, wakeup_bit; 619 u32 clk_status_reg, clk_status_bit; 621 u32 from_host_to_fw_reg, from_host_to_fw_bit; 622 const struct wilc_hif_func *hif_func = wilc->hif_func; 623 624 if (wilc->io_type == WILC_HIF_SDIO) { 625 wakeup_reg = WILC_SDIO_WAKEUP_REG; 626 wakeup_bit = WILC_SDIO_WAKEUP_BIT; 627 clk_status_reg = WILC_SDIO_CLK_STATUS_REG; 628 clk_status_bit = WILC_SDIO_CLK_STATUS_BIT; 629 from_host_to_fw_reg = WILC_SDIO_HOST_TO_FW_REG; 630 from_host_to_fw_bit = WILC_SDIO_HOST_TO_FW_BIT; 631 to_host_from_fw_reg = WILC_SDIO_FW_TO_HOST_REG; 632 to_host_from_fw_bit = WILC_SDIO_FW_TO_HOST_BIT; 633 } else { 634 wakeup_reg = WILC_SPI_WAKEUP_REG; 635 wakeup_bit = WILC_SPI_WAKEUP_BIT; 636 clk_status_reg = WILC_SPI_CLK_STATUS_REG; 637 clk_status_bit = WILC_SPI_CLK_STATUS_BIT; 638 from_host_to_fw_reg = WILC_SPI_HOST_TO_FW_REG; 639 from_host_to_fw_bit = WILC_SPI_HOST_TO_FW_BIT; 640 to_host_from_fw_reg = WILC_SPI_FW_TO_HOST_REG; 641 to_host_from_fw_bit = WILC_SPI_FW_TO_HOST_BIT; 642 } 643 644 /* indicate host wakeup */ 645 ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg, 646 from_host_to_fw_bit); 647 if (ret) 648 return; 649 650 /* Set wake-up bit */ 651 ret = hif_func->hif_write_reg(wilc, wakeup_reg, 652 wakeup_bit); 653 if (ret) 654 return; 655 656 while (trials < WAKE_UP_TRIAL_RETRY) { 657 ret = hif_func->hif_read_reg(wilc, clk_status_reg, 658 &clk_status_val); 659 if (ret) { 660 pr_err("Bus error %d %x\n", ret, clk_status_val); 661 return; 662 } 663 if (clk_status_val & clk_status_bit) 664 break; 665 666 trials++; 667 } 668 if (trials >= WAKE_UP_TRIAL_RETRY) { 669 pr_err("Failed to wake-up the chip\n"); 670 return; 671 } 672 } 673 EXPORT_SYMBOL_GPL(chip_wakeup); 674 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org