Hi folks.
Yet another kernel panic happens while GPU again is hang:

[ 1469.906798] ================================
[ 1469.906799] WARNING: inconsistent lock state
[ 1469.906801] 5.0.0-0.rc4.git2.2.fc30.x86_64 #1 Tainted: G         C
[ 1469.906802] --------------------------------
[ 1469.906804] inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
[ 1469.906806] kworker/12:3/681 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 1469.906807] 00000000d591b82b
(&(&adev->vm_manager.pasid_lock)->rlock){?...}, at:
amdgpu_vm_get_task_info+0x23/0x80 [amdgpu]
[ 1469.906851] {IN-HARDIRQ-W} state was registered at:
[ 1469.906855]   _raw_spin_lock+0x31/0x80
[ 1469.906893]   amdgpu_vm_get_task_info+0x23/0x80 [amdgpu]
[ 1469.906936]   gmc_v9_0_process_interrupt+0x198/0x2b0 [amdgpu]
[ 1469.906978]   amdgpu_irq_dispatch+0x90/0x1f0 [amdgpu]
[ 1469.907018]   amdgpu_irq_callback+0x4a/0x70 [amdgpu]
[ 1469.907061]   amdgpu_ih_process+0x89/0x100 [amdgpu]
[ 1469.907103]   amdgpu_irq_handler+0x22/0x50 [amdgpu]
[ 1469.907106]   __handle_irq_event_percpu+0x3f/0x290
[ 1469.907108]   handle_irq_event_percpu+0x31/0x80
[ 1469.907109]   handle_irq_event+0x34/0x51
[ 1469.907111]   handle_edge_irq+0x7c/0x1a0
[ 1469.907114]   handle_irq+0xbf/0x100
[ 1469.907116]   do_IRQ+0x61/0x120
[ 1469.907118]   ret_from_intr+0x0/0x22
[ 1469.907121]   cpuidle_enter_state+0xbf/0x470
[ 1469.907123]   do_idle+0x1ec/0x280
[ 1469.907125]   cpu_startup_entry+0x19/0x20
[ 1469.907127]   start_secondary+0x1b3/0x200
[ 1469.907129]   secondary_startup_64+0xa4/0xb0
[ 1469.907131] irq event stamp: 5546749
[ 1469.907133] hardirqs last  enabled at (5546749):
[<ffffffff9719112a>] ktime_get+0xfa/0x130
[ 1469.907135] hardirqs last disabled at (5546748):
[<ffffffff9719105b>] ktime_get+0x2b/0x130
[ 1469.907137] softirqs last  enabled at (5498318):
[<ffffffff97e0035f>] __do_softirq+0x35f/0x46a
[ 1469.907140] softirqs last disabled at (5497393):
[<ffffffff970ee119>] irq_exit+0x119/0x120
[ 1469.907141]
               other info that might help us debug this:
[ 1469.907142]  Possible unsafe locking scenario:

[ 1469.907143]        CPU0
[ 1469.907144]        ----
[ 1469.907144]   lock(&(&adev->vm_manager.pasid_lock)->rlock);
[ 1469.907146]   <Interrupt>
[ 1469.907147]     lock(&(&adev->vm_manager.pasid_lock)->rlock);
[ 1469.907148]
                *** DEADLOCK ***

[ 1469.907150] 2 locks held by kworker/12:3/681:
[ 1469.907152]  #0: 00000000953235a7 ((wq_completion)"events"){+.+.},
at: process_one_work+0x1e9/0x5d0
[ 1469.907157]  #1: 0000000071a3d218
((work_completion)(&(&sched->work_tdr)->work)){+.+.}, at:
process_one_work+0x1e9/0x5d0
[ 1469.907160]
               stack backtrace:
[ 1469.907163] CPU: 12 PID: 681 Comm: kworker/12:3 Tainted: G
C        5.0.0-0.rc4.git2.2.fc30.x86_64 #1
[ 1469.907165] Hardware name: System manufacturer System Product
Name/ROG STRIX X470-I GAMING, BIOS 1103 11/16/2018
[ 1469.907169] Workqueue: events drm_sched_job_timedout [gpu_sched]
[ 1469.907171] Call Trace:
[ 1469.907176]  dump_stack+0x85/0xc0
[ 1469.907180]  print_usage_bug.cold+0x1ae/0x1e8
[ 1469.907183]  ? print_shortest_lock_dependencies+0x40/0x40
[ 1469.907185]  mark_lock+0x50a/0x600
[ 1469.907186]  ? print_shortest_lock_dependencies+0x40/0x40
[ 1469.907189]  __lock_acquire+0x544/0x1660
[ 1469.907191]  ? mark_held_locks+0x57/0x80
[ 1469.907193]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[ 1469.907195]  ? lockdep_hardirqs_on+0xed/0x180
[ 1469.907197]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[ 1469.907200]  ? retint_kernel+0x10/0x10
[ 1469.907202]  lock_acquire+0xa2/0x1b0
[ 1469.907242]  ? amdgpu_vm_get_task_info+0x23/0x80 [amdgpu]
[ 1469.907245]  _raw_spin_lock+0x31/0x80
[ 1469.907283]  ? amdgpu_vm_get_task_info+0x23/0x80 [amdgpu]
[ 1469.907323]  amdgpu_vm_get_task_info+0x23/0x80 [amdgpu]
[ 1469.907324] ------------[ cut here ]------------


My kernel commit is: 62967898789d



--
Best Regards,
Mike Gavrilov.