Hi Hans, kernel test robot noticed the following build errors: [auto build test ERROR on pci/next] [also build test ERROR on pci/for-linus mani-mhi/mhi-next soc/for-next linus/master v6.13-rc5 next-20241220] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Hans-Zhang/misc-pci_endpoint_test-Fix-overflow-of-bar_size/20241231-145733 base: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next patch link: https://lore.kernel.org/r/20241231065500.168799-1-18255117159%40163.com patch subject: [v4] misc: pci_endpoint_test: Fix overflow of bar_size config: i386-randconfig-003-20250101 (https://download.01.org/0day-ci/archive/20250101/202501011917.ugP1ywJV-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250101/202501011917.ugP1ywJV-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202501011917.ugP1ywJV-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): ld: drivers/misc/pci_endpoint_test.o: in function `pci_endpoint_test_bar': >> drivers/misc/pci_endpoint_test.c:315: undefined reference to `__udivmoddi4' vim +315 drivers/misc/pci_endpoint_test.c 2a35703a6a00e8 Niklas Cassel 2024-03-22 282 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 283 static bool pci_endpoint_test_bar(struct pci_endpoint_test *test, 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 284 enum pci_barno barno) 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 285 { 2a35703a6a00e8 Niklas Cassel 2024-03-22 286 void *write_buf __free(kfree) = NULL; 2a35703a6a00e8 Niklas Cassel 2024-03-22 287 void *read_buf __free(kfree) = NULL; cda370ec6d1f7b Kishon Vijay Abraham I 2017-08-18 288 struct pci_dev *pdev = test->pdev; bb17ee74a3494e Hans Zhang 2024-12-31 289 int j, buf_size, iters, remain; bb17ee74a3494e Hans Zhang 2024-12-31 290 resource_size_t bar_size; 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 291 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 292 if (!test->bar[barno]) 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 293 return false; 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 294 2a35703a6a00e8 Niklas Cassel 2024-03-22 295 bar_size = pci_resource_len(pdev, barno); 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 296 834b9051992580 Kishon Vijay Abraham I 2017-08-18 297 if (barno == test->test_reg_bar) 2a35703a6a00e8 Niklas Cassel 2024-03-22 298 bar_size = 0x4; 834b9051992580 Kishon Vijay Abraham I 2017-08-18 299 2a35703a6a00e8 Niklas Cassel 2024-03-22 300 /* 2a35703a6a00e8 Niklas Cassel 2024-03-22 301 * Allocate a buffer of max size 1MB, and reuse that buffer while 2a35703a6a00e8 Niklas Cassel 2024-03-22 302 * iterating over the whole BAR size (which might be much larger). 2a35703a6a00e8 Niklas Cassel 2024-03-22 303 */ 2a35703a6a00e8 Niklas Cassel 2024-03-22 304 buf_size = min(SZ_1M, bar_size); 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 305 2a35703a6a00e8 Niklas Cassel 2024-03-22 306 write_buf = kmalloc(buf_size, GFP_KERNEL); 2a35703a6a00e8 Niklas Cassel 2024-03-22 307 if (!write_buf) 2a35703a6a00e8 Niklas Cassel 2024-03-22 308 return false; 2a35703a6a00e8 Niklas Cassel 2024-03-22 309 2a35703a6a00e8 Niklas Cassel 2024-03-22 310 read_buf = kmalloc(buf_size, GFP_KERNEL); 2a35703a6a00e8 Niklas Cassel 2024-03-22 311 if (!read_buf) 2a35703a6a00e8 Niklas Cassel 2024-03-22 312 return false; 2a35703a6a00e8 Niklas Cassel 2024-03-22 313 2a35703a6a00e8 Niklas Cassel 2024-03-22 314 iters = bar_size / buf_size; 2a35703a6a00e8 Niklas Cassel 2024-03-22 @315 for (j = 0; j < iters; j++) 2a35703a6a00e8 Niklas Cassel 2024-03-22 316 if (pci_endpoint_test_bar_memcmp(test, barno, buf_size * j, 2a35703a6a00e8 Niklas Cassel 2024-03-22 317 write_buf, read_buf, buf_size)) 2a35703a6a00e8 Niklas Cassel 2024-03-22 318 return false; 2a35703a6a00e8 Niklas Cassel 2024-03-22 319 2a35703a6a00e8 Niklas Cassel 2024-03-22 320 remain = bar_size % buf_size; 2a35703a6a00e8 Niklas Cassel 2024-03-22 321 if (remain) 2a35703a6a00e8 Niklas Cassel 2024-03-22 322 if (pci_endpoint_test_bar_memcmp(test, barno, buf_size * iters, 2a35703a6a00e8 Niklas Cassel 2024-03-22 323 write_buf, read_buf, remain)) 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 324 return false; 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 325 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 326 return true; 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 327 } 2c156ac71c6b25 Kishon Vijay Abraham I 2017-03-27 328 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
