Hi Andy, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.15 next-20211111] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/fpga-dfl-pci-Use... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git d2f38a3c6507b2520101f9a3807ed98f1bdc545a config: i386-buildonly-randconfig-r005-20211112 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 63ef0e17e28827eae53133b3467bdac7d9729318) 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/0day-ci/linux/commit/dfc10076ac7a63331954a33cabf94a1af... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Andy-Shevchenko/fpga-dfl-pci-Use-pci_find_vsec_capability-when-looking-for-DFL/20211109-234228 git checkout dfc10076ac7a63331954a33cabf94a1af3632210 # save the attached .config 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/ sound/ 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 >>): voff = pci_find_vsec_capability(dev, PCI_VENDOR_ID_INTEL, PCI_VSEC_ID_INTEL_DFLS); ^ if (!pci_set_dma_mask(pcidev, DMA_BIT_MASK(64))) { ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ drivers/fpga/dfl-pci.c:351:45: error: shift count >= width of type [-Werror,-Wshift-count-overflow] ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(64)); ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ 3 errors generated. vim +/dev +146 drivers/fpga/dfl-pci.c 138 139 static int find_dfls_by_vsec(struct pci_dev *pcidev, struct dfl_fpga_enum_info *info) 140 { 141 u32 bir, offset, dfl_cnt, dfl_res; 142 resource_size_t start, len; 143 int dfl_res_off, i, bars; 144 u16 voff; 145 147 if (!voff) { 148 dev_dbg(&pcidev->dev, "%s no DFL VSEC found\n", __func__); 149 return -ENODEV; 150 } 151 152 dfl_cnt = 0; 153 pci_read_config_dword(pcidev, voff + PCI_VNDR_DFLS_CNT, &dfl_cnt); 154 if (dfl_cnt > PCI_STD_NUM_BARS) { 155 dev_err(&pcidev->dev, "%s too many DFLs %d > %d\n", 156 __func__, dfl_cnt, PCI_STD_NUM_BARS); 157 return -EINVAL; 158 } 159 160 dfl_res_off = voff + PCI_VNDR_DFLS_RES; 161 if (dfl_res_off + (dfl_cnt * sizeof(u32)) > PCI_CFG_SPACE_EXP_SIZE) { 162 dev_err(&pcidev->dev, "%s DFL VSEC too big for PCIe config space\n", 163 __func__); 164 return -EINVAL; 165 } 166 167 for (i = 0, bars = 0; i < dfl_cnt; i++, dfl_res_off += sizeof(u32)) { 168 dfl_res = GENMASK(31, 0); 169 pci_read_config_dword(pcidev, dfl_res_off, &dfl_res); 170 171 bir = dfl_res & PCI_VNDR_DFLS_RES_BAR_MASK; 172 if (bir >= PCI_STD_NUM_BARS) { 173 dev_err(&pcidev->dev, "%s bad bir number %d\n", 174 __func__, bir); 175 return -EINVAL; 176 } 177 178 if (bars & BIT(bir)) { 179 dev_err(&pcidev->dev, "%s DFL for BAR %d already specified\n", 180 __func__, bir); 181 return -EINVAL; 182 } 183 184 bars |= BIT(bir); 185 186 len = pci_resource_len(pcidev, bir); 187 offset = dfl_res & PCI_VNDR_DFLS_RES_OFF_MASK; 188 if (offset >= len) { 189 dev_err(&pcidev->dev, "%s bad offset %u >= %pa\n", 190 __func__, offset, &len); 191 return -EINVAL; 192 } 193 194 dev_dbg(&pcidev->dev, "%s BAR %d offset 0x%x\n", __func__, bir, offset); 195 196 len -= offset; 197 198 start = pci_resource_start(pcidev, bir) + offset; 199 200 dfl_fpga_enum_info_add_dfl(info, start, len); 201 } 202 203 return 0; 204 } 205 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org