tree: https://github.com/meghadey/crypto d_msix_one head: fa7e3d01a9b3e08be49c417733dfc030ca6f1b80 commit: fecb2c96796ae216252f783daef6fe56efab40d7 [6/8] PCI/MSI: Enable dynamic allocation of MSI-X vectors config: arm-buildonly-randconfig-r006-20210908 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 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://github.com/meghadey/crypto/commit/fecb2c96796ae216252f783daef6fe5... git remote add meghadey-crypto https://github.com/meghadey/crypto git fetch --no-tags meghadey-crypto d_msix_one git checkout fecb2c96796ae216252f783daef6fe56efab40d7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm 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 >>): kernel/irq/msi.c: In function 'msi_populate_sysfs': 122 | num_msi = pci_msix_vec_count(to_pci_dev(dev)); | ^~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/pci_msix_vec_count +122 kernel/irq/msi.c 96 97 /** 98 * msi_populate_sysfs - Populate msi_irqs sysfs entries for devices 99 * @dev: The device(PCI, platform etc) who will get sysfs entries 100 * 101 * Return attribute_group ** so that specific bus MSI can save it to 102 * somewhere during initilizing msi irqs. If devices has no MSI irq, 103 * return NULL; if it fails to populate sysfs, return ERR_PTR 104 */ 105 const struct attribute_group **msi_populate_sysfs(struct device *dev) 106 { 107 const struct attribute_group **msi_irq_groups; 108 struct attribute **msi_attrs, *msi_attr; 109 struct device_attribute *msi_dev_attr; 110 struct attribute_group *msi_irq_group; 111 struct msi_desc *entry; 112 int ret = -ENOMEM; 113 int num_msi = 0; 114 int count = 0; 115 int i; 116 117 entry = first_msi_entry(dev); 118 if (IS_ENABLED(CONFIG_PCI_MSI) && entry->msi_attrib.is_msix) { 119 /* Since msi-x vectors can be allocated multiple times, 120 * allocate maximum no. of vectors supported by the device 121 */ 123 } else { 124 /* Determine how many msi entries we have */ 125 for_each_msi_entry(entry, dev) 126 num_msi += entry->nvec_used; 127 } 128 129 if (!num_msi) 130 return NULL; 131 132 /* Dynamically create the MSI attributes for the device */ 133 msi_attrs = kcalloc(num_msi + 1, sizeof(void *), GFP_KERNEL); 134 if (!msi_attrs) 135 return ERR_PTR(-ENOMEM); 136 137 for_each_msi_entry(entry, dev) { 138 for (i = 0; i < entry->nvec_used; i++) { 139 msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL); 140 if (!msi_dev_attr) 141 goto error_attrs; 142 msi_attrs[count] = &msi_dev_attr->attr; 143 144 sysfs_attr_init(&msi_dev_attr->attr); 145 msi_dev_attr->attr.name = kasprintf(GFP_KERNEL, "%d", 146 entry->irq + i); 147 if (!msi_dev_attr->attr.name) 148 goto error_attrs; 149 msi_dev_attr->attr.mode = 0444; 150 msi_dev_attr->show = msi_mode_show; 151 ++count; 152 } 153 } 154 155 msi_irq_group = kzalloc(sizeof(*msi_irq_group), GFP_KERNEL); 156 if (!msi_irq_group) 157 goto error_attrs; 158 msi_irq_group->name = "msi_irqs"; 159 msi_irq_group->attrs = msi_attrs; 160 161 msi_irq_groups = kcalloc(2, sizeof(void *), GFP_KERNEL); 162 if (!msi_irq_groups) 163 goto error_irq_group; 164 msi_irq_groups[0] = msi_irq_group; 165 166 ret = sysfs_create_groups(&dev->kobj, msi_irq_groups); 167 if (ret) 168 goto error_irq_groups; 169 170 return msi_irq_groups; 171 172 error_irq_groups: 173 kfree(msi_irq_groups); 174 error_irq_group: 175 kfree(msi_irq_group); 176 error_attrs: 177 count = 0; 178 msi_attr = msi_attrs[count]; 179 while (msi_attr) { 180 msi_dev_attr = container_of(msi_attr, struct device_attribute, attr); 181 kfree(msi_attr->name); 182 kfree(msi_dev_attr); 183 ++count; 184 msi_attr = msi_attrs[count]; 185 } 186 kfree(msi_attrs); 187 return ERR_PTR(ret); 188 } 189 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org