drivers/bus/mhi/core/pm.c:740:6: warning: stack frame size of 1408 bytes in function 'mhi_pm_st_worker'

From: kernel test robot
Date: Sat Apr 10 2021 - 20:15:31 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 52e44129fba5cfc4e351fdb5e45849afc74d9a53
commit: 556bbb442bbb44f429dbaa9f8b48e0b4cda6e088 bus: mhi: core: Separate system error and power down handling
date: 5 months ago
config: powerpc-randconfig-r024-20210411 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project dd453a1389b6a7e6d9214b449d3c54981b1a89b6)
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 powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-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 ARCH=powerpc

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/bus/mhi/core/pm.c:740:6: warning: stack frame size of 1408 bytes in function 'mhi_pm_st_worker' [-Wframe-larger-than=]
void mhi_pm_st_worker(struct work_struct *work)
^
1 warning 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.sadhasivam@xxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip