Hi Bhaumik, FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 7f75285ca572eaabc028cf78c6ab5473d0d160be commit: 556bbb442bbb44f429dbaa9f8b48e0b4cda6e088 bus: mhi: core: Separate system error and power down handling date: 5 months ago config: powerpc64-randconfig-r034-20210414 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=556bbb442bbb44f429dbaa9f8b48e0b4cda6e088 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 556bbb442bbb44f429dbaa9f8b48e0b4cda6e088 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> All warnings (new ones prefixed by >>): ^ arch/powerpc/include/asm/io.h:522:62: note: expanded from macro '__do_outl' #define __do_outl(val, port) writel(val,(PCI_IO_ADDR)_IO_BASE+port); ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/bus/mhi/core/pm.c:10: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:43:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insb, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:236:1: note: expanded from here __do_insb ^ arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb' #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/bus/mhi/core/pm.c:10: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:238:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/bus/mhi/core/pm.c:10: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:2:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/bus/mhi/core/pm.c:10: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:4:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/bus/mhi/core/pm.c:10: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:6:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from drivers/bus/mhi/core/pm.c:10: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:8:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> drivers/bus/mhi/core/pm.c:740:6: warning: stack frame size of 3568 bytes in >> function 'mhi_pm_st_worker' [-Wframe-larger-than=] void mhi_pm_st_worker(struct work_struct *work) ^ 13 warnings generated. vim +/mhi_pm_st_worker +740 drivers/bus/mhi/core/pm.c a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 738 a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 739 /* Device State Transition worker */ a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 @740 void mhi_pm_st_worker(struct work_struct *work) a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 741 { a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 742 struct state_transition *itr, *tmp; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 743 LIST_HEAD(head); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 744 struct mhi_controller *mhi_cntrl = container_of(work, a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 745 struct mhi_controller, a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 746 st_worker); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 747 struct device *dev = &mhi_cntrl->mhi_dev->dev; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 748 a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 749 spin_lock_irq(&mhi_cntrl->transition_lock); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 750 list_splice_tail_init(&mhi_cntrl->transition_list, &head); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 751 spin_unlock_irq(&mhi_cntrl->transition_lock); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 752 a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 753 list_for_each_entry_safe(itr, tmp, &head, node) { a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 754 list_del(&itr->node); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 755 dev_dbg(dev, "Handling state transition: %s\n", a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 756 TO_DEV_STATE_TRANS_STR(itr->state)); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 757 a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 758 switch (itr->state) { a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 759 case DEV_ST_TRANSITION_PBL: a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 760 write_lock_irq(&mhi_cntrl->pm_lock); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 761 if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 762 mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 763 write_unlock_irq(&mhi_cntrl->pm_lock); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 764 if (MHI_IN_PBL(mhi_cntrl->ee)) 560e3a045961ed Bhaumik Bhatt 2020-05-21 765 mhi_fw_load_handler(mhi_cntrl); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 766 break; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 767 case DEV_ST_TRANSITION_SBL: a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 768 write_lock_irq(&mhi_cntrl->pm_lock); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 769 mhi_cntrl->ee = MHI_EE_SBL; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 770 write_unlock_irq(&mhi_cntrl->pm_lock); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 771 /* a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 772 * The MHI devices are only created when the client a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 773 * device switches its Execution Environment (EE) to a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 774 * either SBL or AMSS states a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 775 */ a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 776 mhi_create_devices(mhi_cntrl); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 777 break; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 778 case DEV_ST_TRANSITION_MISSION_MODE: a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 779 mhi_pm_mission_mode_transition(mhi_cntrl); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 780 break; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 781 case DEV_ST_TRANSITION_READY: a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 782 mhi_ready_state_transition(mhi_cntrl); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 783 break; bc7ccce5a5192c Hemant Kumar 2020-05-21 784 case DEV_ST_TRANSITION_SYS_ERR: 556bbb442bbb44 Bhaumik Bhatt 2020-11-09 785 mhi_pm_sys_error_transition(mhi_cntrl); bc7ccce5a5192c Hemant Kumar 2020-05-21 786 break; 3c1bd0047124f5 Hemant Kumar 2020-05-21 787 case DEV_ST_TRANSITION_DISABLE: 3c1bd0047124f5 Hemant Kumar 2020-05-21 788 mhi_pm_disable_transition 3c1bd0047124f5 Hemant Kumar 2020-05-21 789 (mhi_cntrl, MHI_PM_SHUTDOWN_PROCESS); 3c1bd0047124f5 Hemant Kumar 2020-05-21 790 break; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 791 default: a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 792 break; a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 793 } a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 794 kfree(itr); a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 795 } a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 796 } a6e2e3522f2914 Manivannan Sadhasivam 2020-02-20 797 :::::: The code at line 740 was first introduced by commit :::::: a6e2e3522f29141b95c1ef8580c665a3582b3e66 bus: mhi: core: Add support for PM state transitions :::::: TO: Manivannan Sadhasivam <manivannan.sadhasi...@linaro.org> :::::: CC: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
Description: application/gzip
