Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 6239f32478b26c16e2a98f99519f971013f85a32 ("[PATCH v2] pci: call cond_resched() after pci bus config writing") url: https://github.com/0day-ci/linux/commits/menglong8-dong-gmail-com/pci-cal... base: https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git next in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +---------------------------------------------------------------------------+------------+------------+ | | d53c18bef9 | 6239f32478 | +---------------------------------------------------------------------------+------------+------------+ | boot_successes | 6 | 0 | | boot_failures | 0 | 7 | | BUG:sleeping_function_called_from_invalid_context_at_drivers/pci/access.c | 0 | 7 | +---------------------------------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; [ 17.382175][ T258] BUG: sleeping function called from invalid context at drivers/pci/access.c:68 [ 17.383077][ T258] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 258, name: scsi_eh_0 [ 17.383901][ T258] 2 locks held by scsi_eh_0/258: [ 17.384375][ T258] #0: ffff88813e18a0e0 (&host->eh_mutex){+.+.}-{3:3}, at: ata_eh_acquire+0x16/0x50 [ 17.385253][ T258] #1: ffffffff842f5b18 (piix_lock){....}-{2:2}, at: piix_set_timings+0x8c/0x2d0 [ 17.385450][ T258] irq event stamp: 74 [ 17.385450][ T258] hardirqs last enabled at (73): [<ffffffff827b8802>] _raw_spin_unlock_irqrestore+0x42/0x50 [ 17.385450][ T258] hardirqs last disabled at (74): [<ffffffff827b860b>] _raw_spin_lock_irqsave+0x4b/0x50 [ 17.385450][ T258] softirqs last enabled at (50): [<ffffffff82a002f9>] __do_softirq+0x2f9/0x48a [ 17.385450][ T258] softirqs last disabled at (31): [<ffffffff81169b2e>] irq_exit_rcu+0x8e/0xb0 [ 17.385450][ T258] CPU: 1 PID: 258 Comm: scsi_eh_0 Not tainted 5.15.0-rc2-00083-g6239f32478b2 #1 [ 17.385450][ T258] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 17.385450][ T258] Call Trace: [ 17.385450][ T258] dump_stack_lvl+0x57/0x7d [ 17.385450][ T258] ___might_sleep.cold+0xa6/0xb8 [ 17.385450][ T258] pci_bus_write_config_word+0x3c/0x50 [ 17.385450][ T258] piix_set_timings+0x105/0x2d0 [ 17.385450][ T258] ? lockdep_hardirqs_on_prepare+0xd4/0x180 [ 17.385450][ T258] ata_eh_reset+0x14d/0xd10 [ 17.385450][ T258] ? piix_set_piomode+0x20/0x20 [ 17.385450][ T258] ? ata_sff_dev_classify+0x100/0x100 [ 17.385450][ T258] ? sata_sff_hardreset+0x70/0x70 [ 17.385450][ T258] ? ata_eh_schedule_probe+0x10e/0x1e0 [ 17.385450][ T258] ? ata_sff_dev_classify+0x100/0x100 [ 17.385450][ T258] ? sata_sff_hardreset+0x70/0x70 [ 17.385450][ T258] ata_eh_recover+0x48e/0x1290 [ 17.385450][ T258] ? piix_set_piomode+0x20/0x20 [ 17.385450][ T258] ? ata_sff_dev_classify+0x100/0x100 [ 17.385450][ T258] ? sata_sff_hardreset+0x70/0x70 [ 17.385450][ T258] ? ata_sff_softreset+0x180/0x180 [ 17.385450][ T258] ? sata_sff_hardreset+0x70/0x70 [ 17.385450][ T258] ? piix_set_piomode+0x20/0x20 [ 17.385450][ T258] ? ata_sff_dev_classify+0x100/0x100 [ 17.385450][ T258] ata_do_eh+0x3b/0xa0 [ 17.385450][ T258] ata_scsi_port_error_handler+0x36c/0x7d0 [ 17.385450][ T258] ? lockdep_hardirqs_on_prepare+0xd4/0x180 [ 17.385450][ T258] ? _raw_spin_unlock_irqrestore+0x42/0x50 [ 17.385450][ T258] ? scsi_error_handler+0x35/0x540 [ 17.385450][ T258] ata_scsi_error+0x8e/0xb0 [ 17.385450][ T258] scsi_error_handler+0xc6/0x540 [ 17.385450][ T258] ? lockdep_hardirqs_on_prepare+0xd4/0x180 [ 17.385450][ T258] ? _raw_spin_unlock_irqrestore+0x42/0x50 [ 17.385450][ T258] ? scsi_eh_get_sense+0x240/0x240 [ 17.385450][ T258] kthread+0x12e/0x150 [ 17.385450][ T258] ? set_kthread_struct+0x40/0x40 [ 17.385450][ T258] ret_from_fork+0x22/0x30 To reproduce: # build kernel cd linux cp config-5.15.0-rc2-00083-g6239f32478b2 .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang