Hi Keith, I love your patch! Perhaps something to improve: [auto build test WARNING on pci/next] [also build test WARNING on next-20201217] [cannot apply to v5.10] [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/Keith-Busch/PCI-ERR-Clear-status... base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next config: powerpc64-randconfig-r026-20201217 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project cee1e7d14f4628d6174b33640d502bff3b54ae45) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://github.com/0day-ci/linux/commit/8f1a820daa9ec2e25dfbdd5b4752df01e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Keith-Busch/PCI-ERR-Clear-status-of-the-reporting-device/20201218-011952 git checkout 8f1a820daa9ec2e25dfbdd5b4752df01e849b3aa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): pci_info(dev, "%s Port link has been reset (%d)\n", rc, ~~ ^~ %d include/linux/pci.h:2417:67: note: expanded from macro 'pci_info' #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg) ~~~ ^~~ include/linux/dev_printk.h:118:33: note: expanded from macro 'dev_info' _dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ pci_is_root_bus(dev->bus) ? "Root" : "Downstream"); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/pci.h:2417:67: note: expanded from macro 'pci_info' #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg) ~~~ ^~~ include/linux/dev_printk.h:118:33: note: expanded from macro 'dev_info' _dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ 2 warnings generated. vim +1417 drivers/pci/pcie/aer.c 1367 1368 /** 1369 * aer_root_reset - reset Root Port hierarchy, RCEC, or RCiEP 1370 * @dev: pointer to Root Port, RCEC, or RCiEP 1371 * 1372 * Invoked by Port Bus driver when performing reset. 1373 */ 1374 static pci_ers_result_t aer_root_reset(struct pci_dev *dev) 1375 { 1376 int type = pci_pcie_type(dev); 1377 struct pci_dev *root; 1378 int aer; 1379 struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); 1380 u32 reg32; 1381 int rc; 1382 1383 /* 1384 * Only Root Ports and RCECs have AER Root Command and Root Status 1385 * registers. If "dev" is an RCiEP, the relevant registers are in 1386 * the RCEC. 1387 */ 1388 if (type == PCI_EXP_TYPE_RC_END) 1389 root = dev->rcec; 1390 else 1391 root = pcie_find_root_port(dev); 1392 1393 /* 1394 * If the platform retained control of AER, an RCiEP may not have 1395 * an RCEC visible to us, so dev->rcec ("root") may be NULL. In 1396 * that case, firmware is responsible for these registers. 1397 */ 1398 aer = root ? root->aer_cap : 0; 1399 1400 if ((host->native_aer || pcie_ports_native) && aer) { 1401 /* Disable Root's interrupt in response to error messages */ 1402 pci_read_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, &reg32); 1403 reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK; 1404 pci_write_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, reg32); 1405 } 1406 1407 if (type == PCI_EXP_TYPE_RC_EC || type == PCI_EXP_TYPE_RC_END) { 1408 if (pcie_has_flr(dev)) { 1409 rc = pcie_flr(dev); 1410 pci_info(dev, "has been reset (%d)\n", rc); 1411 } else { 1412 pci_info(dev, "not reset (no FLR support)\n"); 1413 rc = -ENOTTY; 1414 } 1415 } else { 1416 rc = pci_bus_error_reset(dev); 1419 } 1420 1421 if ((host->native_aer || pcie_ports_native) && aer) { 1422 /* Clear Root Error Status */ 1423 pci_read_config_dword(root, aer + PCI_ERR_ROOT_STATUS, &reg32); 1424 pci_write_config_dword(root, aer + PCI_ERR_ROOT_STATUS, reg32); 1425 1426 /* Enable Root Port's interrupt in response to error messages */ 1427 pci_read_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, &reg32); 1428 reg32 |= ROOT_PORT_INTR_ON_MESG_MASK; 1429 pci_write_config_dword(root, aer + PCI_ERR_ROOT_COMMAND, reg32); 1430 } 1431 1432 return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED; 1433 } 1434 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org