tree: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next head: 5264d800ffd532b515f32ad3a3439b5611438157 commit: 9896a58cdd59a6454adeebbe10a881b05550e63a [20/23] PCI: ACPI: PM: Do not use pci_platform_pm_ops for ACPI config: ia64-randconfig-r031-20210928 (attached as .config) compiler: ia64-linux-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://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commit/?id=9896a58cdd59a6454adeebbe10a881b05550e63a git remote add rafael-pm https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git git fetch --no-tags rafael-pm linux-next git checkout 9896a58cdd59a6454adeebbe10a881b05550e63a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from arch/ia64/include/asm/pgtable.h:153, from include/linux/pgtable.h:6, from arch/ia64/include/asm/uaccess.h:40, from include/linux/uaccess.h:11, from arch/ia64/include/asm/sections.h:11, from include/linux/interrupt.h:21, from include/linux/pci.h:38, from drivers/pci/pci-acpi.c:13: arch/ia64/include/asm/mmu_context.h: In function 'reload_context': arch/ia64/include/asm/mmu_context.h:127:48: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable] 127 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4; | ^~~~~~~ drivers/pci/pci-acpi.c: In function 'acpi_pci_need_resume': >> drivers/pci/pci-acpi.c:1127:12: warning: 'adev' is used uninitialized [-Wuninitialized] 1127 | if (!adev || !acpi_device_power_manageable(adev)) | ^ vim +/adev +1127 drivers/pci/pci-acpi.c b67ea76172d4b19 Rafael J. Wysocki 2010-02-17 1109 9896a58cdd59a64 Rafael J. Wysocki 2021-09-20 1110 bool acpi_pci_need_resume(struct pci_dev *dev) bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1111 { 9896a58cdd59a64 Rafael J. Wysocki 2021-09-20 1112 struct acpi_device *adev; 9896a58cdd59a64 Rafael J. Wysocki 2021-09-20 1113 9896a58cdd59a64 Rafael J. Wysocki 2021-09-20 1114 if (acpi_pci_disabled) 9896a58cdd59a64 Rafael J. Wysocki 2021-09-20 1115 return false; bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1116 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1117 /* 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1118 * In some cases (eg. Samsung 305V4A) leaving a bridge in suspend over 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1119 * system-wide suspend/resume confuses the platform firmware, so avoid 9d64b539b738fc1 Rafael J. Wysocki 2018-08-16 1120 * doing that. According to Section 16.1.6 of ACPI 6.2, endpoint 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1121 * devices are expected to be in D3 before invoking the S3 entry path 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1122 * from the firmware, so they should not be affected by this issue. 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1123 */ 9d64b539b738fc1 Rafael J. Wysocki 2018-08-16 1124 if (pci_is_bridge(dev) && acpi_target_system_state() != ACPI_STATE_S0) 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1125 return true; 26112ddc254c986 Rafael J. Wysocki 2018-06-30 1126 bac2a909a096c91 Rafael J. Wysocki 2015-01-21 @1127 if (!adev || !acpi_device_power_manageable(adev)) bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1128 return false; bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1129 9896a58cdd59a64 Rafael J. Wysocki 2021-09-20 1130 adev = ACPI_COMPANION(&dev->dev); 9a51c6b1f9e0239 Rafael J. Wysocki 2019-05-16 1131 if (adev->wakeup.flags.valid && 9a51c6b1f9e0239 Rafael J. Wysocki 2019-05-16 1132 device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count) bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1133 return true; bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1134 bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1135 if (acpi_target_system_state() == ACPI_STATE_S0) bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1136 return false; bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1137 bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1138 return !!adev->power.flags.dsw_present; bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1139 } bac2a909a096c91 Rafael J. Wysocki 2015-01-21 1140 :::::: The code at line 1127 was first introduced by commit :::::: bac2a909a096c9110525c18cbb8ce73c660d5f71 PCI / PM: Avoid resuming PCI devices during system suspend :::::: TO: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> :::::: CC: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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