tree: https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git mhi-next head: 0a3b31f6259f4849e4e93731d4c8d7910be072a7 commit: 4a98958ca237a4b7974ea1ec2092b3666bdd26ab [2/3] bus: mhi: host: make mhi_controller_config::event_cfg const config: arm64-randconfig-r036-20220906 compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project c55b41d5199d2394dd6cdb8f52180d8b81d809d4) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git/commit/?id=4a98958ca237a4b7974ea1ec2092b3666bdd26ab git remote add mani-mhi https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi.git git fetch --no-tags mani-mhi mhi-next git checkout 4a98958ca237a4b7974ea1ec2092b3666bdd26ab # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/bus/mhi/host/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All errors (new ones prefixed by >>): >> drivers/bus/mhi/host/pci_generic.c:734:39: error: cannot assign to variable 'mhi_cntrl_config' with const-qualified type 'const struct mhi_controller_config *' mhi_cntrl_config->event_cfg[i].irq = 0; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ drivers/bus/mhi/host/pci_generic.c:710:44: note: variable 'mhi_cntrl_config' declared const here const struct mhi_controller_config *mhi_cntrl_config) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ 1 error generated. vim +734 drivers/bus/mhi/host/pci_generic.c 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 708 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 709 static int mhi_pci_get_irqs(struct mhi_controller *mhi_cntrl, 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 710 const struct mhi_controller_config *mhi_cntrl_config) 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 711 { 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 712 struct pci_dev *pdev = to_pci_dev(mhi_cntrl->cntrl_dev); 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 713 int nr_vectors, i; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 714 int *irq; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 715 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 716 /* 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 717 * Alloc one MSI vector for BHI + one vector per event ring, ideally... 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 718 * No explicit pci_free_irq_vectors required, done by pcim_release. 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 719 */ 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 720 mhi_cntrl->nr_irqs = 1 + mhi_cntrl_config->num_events; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 721 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 722 nr_vectors = pci_alloc_irq_vectors(pdev, 1, mhi_cntrl->nr_irqs, PCI_IRQ_MSI); 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 723 if (nr_vectors < 0) { 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 724 dev_err(&pdev->dev, "Error allocating MSI vectors %d\n", 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 725 nr_vectors); 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 726 return nr_vectors; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 727 } 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 728 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 729 if (nr_vectors < mhi_cntrl->nr_irqs) { b91c3b30e22672 drivers/bus/mhi/pci_generic.c Loic Poulain 2021-01-05 730 dev_warn(&pdev->dev, "using shared MSI\n"); b91c3b30e22672 drivers/bus/mhi/pci_generic.c Loic Poulain 2021-01-05 731 b91c3b30e22672 drivers/bus/mhi/pci_generic.c Loic Poulain 2021-01-05 732 /* Patch msi vectors, use only one (shared) */ b91c3b30e22672 drivers/bus/mhi/pci_generic.c Loic Poulain 2021-01-05 733 for (i = 0; i < mhi_cntrl_config->num_events; i++) b91c3b30e22672 drivers/bus/mhi/pci_generic.c Loic Poulain 2021-01-05 @734 mhi_cntrl_config->event_cfg[i].irq = 0; b91c3b30e22672 drivers/bus/mhi/pci_generic.c Loic Poulain 2021-01-05 735 mhi_cntrl->nr_irqs = 1; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 736 } 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 737 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 738 irq = devm_kcalloc(&pdev->dev, mhi_cntrl->nr_irqs, sizeof(int), GFP_KERNEL); 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 739 if (!irq) 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 740 return -ENOMEM; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 741 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 742 for (i = 0; i < mhi_cntrl->nr_irqs; i++) { 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 743 int vector = i >= nr_vectors ? (nr_vectors - 1) : i; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 744 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 745 irq[i] = pci_irq_vector(pdev, vector); 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 746 } 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 747 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 748 mhi_cntrl->irq = irq; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 749 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 750 return 0; 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 751 } 855a70c12021bd drivers/bus/mhi/pci_generic.c Loic Poulain 2020-10-21 752 :::::: The code at line 734 was first introduced by commit :::::: b91c3b30e2267265cd7e67cb3d0c99c48c02b001 mhi: pci_generic: Fix shared MSI vector support :::::: TO: Loic Poulain :::::: CC: Manivannan Sadhasivam -- 0-DAY CI Kernel Test Service https://01.org/lkp