tree: https://github.com/ls-zhu/linux shared_irq_v4 head: 25e932e005734a4b8924e41bbedafa9dd394aead commit: 25e932e005734a4b8924e41bbedafa9dd394aead [3/3] vDPA/ifcvf: implement device MSIX vector allocator config: i386-randconfig-a004 (https://download.01.org/0day-ci/archive/20220216/202202162136.H3NDPxQe-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0e628a783b935c70c80815db6c061ec84f884af5) 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://github.com/ls-zhu/linux/commit/25e932e005734a4b8924e41bbedafa9dd3... git remote add ls-zhu https://github.com/ls-zhu/linux git fetch --no-tags ls-zhu shared_irq_v4 git checkout 25e932e005734a4b8924e41bbedafa9dd394aead # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/vdpa/ifcvf/ 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 >>): u16 max_intr; ^ 1 warning generated. vim +/max_intr +94 drivers/vdpa/ifcvf/ifcvf_main.c 88 89 static int ifcvf_request_irq(struct ifcvf_adapter *adapter) 90 { 91 struct pci_dev *pdev = adapter->pdev; 92 struct ifcvf_hw *vf = &adapter->vf; 93 int vector, nvectors, i, ret, irq; 95 96 nvectors = ifcvf_alloc_vectors(adapter); 97 if (nvectors <=0) 98 return nvectors; 99 100 max_intr = vf->nr_vring + 1; 101 snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n", 102 pci_name(pdev)); 103 vector = 0; 104 vf->config_irq = pci_irq_vector(pdev, vector); 105 ret = devm_request_irq(&pdev->dev, vf->config_irq, 106 ifcvf_config_changed, 0, 107 vf->config_msix_name, vf); 108 if (ret) { 109 IFCVF_ERR(pdev, "Failed to request config irq\n"); 110 return ret; 111 } 112 113 for (i = 0; i < vf->nr_vring; i++) { 114 snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n", 115 pci_name(pdev), i); 116 vector = i + IFCVF_MSI_QUEUE_OFF; 117 irq = pci_irq_vector(pdev, vector); 118 ret = devm_request_irq(&pdev->dev, irq, 119 ifcvf_intr_handler, 0, 120 vf->vring[i].msix_name, 121 &vf->vring[i]); 122 if (ret) { 123 IFCVF_ERR(pdev, 124 "Failed to request irq for vq %d\n", i); 125 ifcvf_free_irq(adapter, i); 126 127 return ret; 128 } 129 130 vf->vring[i].irq = irq; 131 } 132 133 return 0; 134 } 135 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org