tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git tmp head: 13665f1f8b5d501b40b1bc8448b0a032c7f04cc2 commit: 408b2b0c3fd434779f9c862fed5f2b0cc76ba606 [27/44] slimbus: qcom: fix potential NULL dereference in qcom_slim_prg_slew() config: ia64-allmodconfig (attached as .config) compiler: ia64-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/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable tmp git checkout 408b2b0c3fd434779f9c862fed5f2b0cc76ba606 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/slimbus/qcom-ctrl.c: In function 'qcom_slim_prg_slew': 477 | ctrl->slew_reg = devm_platform_ioremap_resource_byname(pdev, "slew"); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | devm_platform_ioremap_resource drivers/slimbus/qcom-ctrl.c:477:18: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 477 | ctrl->slew_reg = devm_platform_ioremap_resource_byname(pdev, "slew"); | ^ cc1: some warnings being treated as errors Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for FRAME_POINTER Depends on DEBUG_KERNEL && (M68K || UML || SUPERH) || ARCH_WANT_FRAME_POINTERS Selected by - FAULT_INJECTION_STACKTRACE_FILTER && FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT && !X86_64 && !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86 vim +477 drivers/slimbus/qcom-ctrl.c 471 472 static void qcom_slim_prg_slew(struct platform_device *pdev, 473 struct qcom_slim_ctrl *ctrl) 474 { 475 if (!ctrl->slew_reg) { 476 /* SLEW RATE register for this SLIMbus */ 478 if (IS_ERR(ctrl->slew_reg)) 479 return; 480 } 481 482 writel_relaxed(1, ctrl->slew_reg); 483 /* Make sure SLIMbus-slew rate enabling goes through */ 484 wmb(); 485 } 486 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org