tree: https://github.com/frank-w/BPI-R2-4.14 5.16-pcie3 head: a9c22164bad882113d75519c93d19668e95c3c33 commit: a9c22164bad882113d75519c93d19668e95c3c33 [4/4] some debug for pcie hang config: riscv-randconfig-r021-20220120 (https://download.01.org/0day-ci/archive/20220122/202201221411.nNdgyuxp-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/frank-w/BPI-R2-4.14/commit/a9c22164bad882113d75519c93d... git remote add frank-w-bpi-r2-4.14 https://github.com/frank-w/BPI-R2-4.14 git fetch --no-tags frank-w-bpi-r2-4.14 5.16-pcie3 git checkout a9c22164bad882113d75519c93d19668e95c3c33 # 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=riscv SHELL=/bin/bash drivers/pci/controller/dwc/ 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 >>): struct resource *res = ^ 1 warning generated. vim +677 drivers/pci/controller/dwc/pcie-designware.c 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 665 8bcca26585585a drivers/pci/controller/dwc/pcie-designware.c Hou Zhiqiang 2021-04-13 666 void dw_pcie_iatu_detect(struct dw_pcie *pci) 340cba6092c2c1 drivers/pci/host/pcie-designware.c Jingoo Han 2013-06-21 667 { 5f334db665173f drivers/pci/dwc/pcie-designware.c Kishon Vijay Abraham I 2017-02-15 668 struct device *dev = pci->dev; 13ab639ed48c1e drivers/pci/controller/dwc/pcie-designware.c Kunihiko Hayashi 2020-09-30 669 struct platform_device *pdev = to_platform_device(dev); a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 670 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 2aadcb0cd39198 drivers/pci/controller/dwc/pcie-designware.c Kishon Vijay Abraham I 2019-03-25 671 if (pci->version >= 0x480A || (!pci->version && 2aadcb0cd39198 drivers/pci/controller/dwc/pcie-designware.c Kishon Vijay Abraham I 2019-03-25 672 dw_pcie_iatu_unroll_enabled(pci))) { a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 673 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 2aadcb0cd39198 drivers/pci/controller/dwc/pcie-designware.c Kishon Vijay Abraham I 2019-03-25 674 pci->iatu_unroll_enabled = true; 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 675 if (!pci->atu_base) { a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 676 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 @677 struct resource *res = 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 678 platform_get_resource_byname(pdev, IORESOURCE_MEM, "atu"); 6e5ebc96ec651b drivers/pci/controller/dwc/pcie-designware.c Tim Harvey 2021-11-01 679 if (res) { 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 680 pci->atu_size = resource_size(res); 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 681 pci->atu_base = devm_ioremap_resource(dev, res); 6e5ebc96ec651b drivers/pci/controller/dwc/pcie-designware.c Tim Harvey 2021-11-01 682 } a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 683 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 6e5ebc96ec651b drivers/pci/controller/dwc/pcie-designware.c Tim Harvey 2021-11-01 684 if (!pci->atu_base || IS_ERR(pci->atu_base)) a9f4c2d2f99ec8 drivers/pci/controller/dwc/pcie-designware.c Kishon Vijay Abraham I 2019-03-25 685 pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 686 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 2aadcb0cd39198 drivers/pci/controller/dwc/pcie-designware.c Kishon Vijay Abraham I 2019-03-25 687 } a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 688 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 689 if (!pci->atu_size) 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 690 /* Pick a minimal default, enough for 8 in and 8 out windows */ 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 691 pci->atu_size = SZ_4K; a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 692 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 693 dw_pcie_iatu_detect_regions_unroll(pci); a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 694 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 695 } else{ a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 696 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 697 dw_pcie_iatu_detect_regions(pci);} a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 698 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 699 dev_info(pci->dev, "iATU unroll: %s\n", pci->iatu_unroll_enabled ? 2aadcb0cd39198 drivers/pci/controller/dwc/pcie-designware.c Kishon Vijay Abraham I 2019-03-25 700 "enabled" : "disabled"); a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 701 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 702 dev_info(pci->dev, "Detected iATU regions: %u outbound, %u inbound", 281f1f99cf3a76 drivers/pci/controller/dwc/pcie-designware.c Rob Herring 2020-11-05 703 pci->num_ob_windows, pci->num_ib_windows); a9c22164bad882 drivers/pci/controller/dwc/pcie-designware.c Frank Wunderlich 2022-01-21 704 printk(KERN_ALERT "DEBUG: Passed %s %d \n",__FUNCTION__,__LINE__); 8bcca26585585a drivers/pci/controller/dwc/pcie-designware.c Hou Zhiqiang 2021-04-13 705 } 8bcca26585585a drivers/pci/controller/dwc/pcie-designware.c Hou Zhiqiang 2021-04-13 706 :::::: The code at line 677 was first introduced by commit :::::: 281f1f99cf3a761b45f611943721dfb1895c68a3 PCI: dwc: Detect number of iATU windows :::::: TO: Rob Herring <robh(a)kernel.org&gt; :::::: CC: Lorenzo Pieralisi <lorenzo.pieralisi(a)arm.com&gt; 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