Hello Himanshu, If I load the qla2xxx driver (git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git, 4.15/scsi-queue) then a new kernel warning appears. This did not happen with kernel v4.13. Can you have a look? qla2xxx [0000:00:00.0]-0005: : QLogic Fibre Channel HBA Driver: 10.00.00.02-k. qla2xxx [0000:00:09.0]-001d: : Found an ISP2432 irq 10 iobase 0xffffc9000022d000. BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/1040 caller is debug_smp_processor_id+0x17/0x20 CPU: 7 PID: 1040 Comm: modprobe Not tainted 4.13.0-dbg+ #2 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: dump_stack+0x86/0xcf check_preemption_disabled+0xe3/0xf0 debug_smp_processor_id+0x17/0x20 qla2x00_probe_one+0xfc8/0x28b0 [qla2xxx] ? trace_hardirqs_on_caller+0xf4/0x190 ? trace_hardirqs_on+0xd/0x10 ? _raw_spin_unlock_irqrestore+0x45/0x70 pci_device_probe+0xca/0x140 driver_probe_device+0x2c5/0x430 __driver_attach+0xde/0xe0 ? driver_probe_device+0x430/0x430 bus_for_each_dev+0x5d/0x90 driver_attach+0x19/0x20 bus_add_driver+0x169/0x260 driver_register+0x5b/0xd0 __pci_register_driver+0x63/0x70 qla2x00_module_init+0x1d6/0x222 [qla2xxx] ? 0xffffffffa0491000 do_one_initcall+0x3e/0x16c ? kmem_cache_alloc+0xfa/0x160 do_init_module+0x55/0x1eb load_module+0x22f5/0x2b30 ? kernel_read+0x41/0x60 SYSC_finit_module+0xbc/0xf0 ? SYSC_finit_module+0xbc/0xf0 SyS_finit_module+0x9/0x10 entry_SYSCALL_64_fastpath+0x23/0xc2 (gdb) list *(qla2x00_probe_one+0xfc8) 0x9738 is in qla2x00_probe_one (drivers/scsi/qla2xxx/qla_os.c:400). 395 ha->base_qpair->msix = &ha->msix_entries[QLA_MSIX_RSP_Q]; 396 INIT_LIST_HEAD(&ha->base_qpair->hints_list); 397 INIT_LIST_HEAD(&ha->base_qpair->nvme_done_list); 398 ha->base_qpair->enable_class_2 = ql2xenableclass2; 399 /* init qpair to this cpu. Will adjust at run time. */ 400 qla_cpu_update(rsp->qpair, smp_processor_id()); 401 ha->base_qpair->pdev = ha->pdev; 402 403 if (IS_QLA27XX(ha) || IS_QLA83XX(ha)) 404 ha->base_qpair->reqq_start_iocbs = qla_83xx_start_iocbs; Thanks, Bart.
