[    7.858446] ================================
[    7.858448] WARNING: inconsistent lock state
[    7.858450] 5.9.0-rc3-rt3+ #33 Not tainted
[    7.858453] --------------------------------
[    7.858456] inconsistent {IN-HARDIRQ-R} -> {HARDIRQ-ON-W} usage.
[    7.858459] swapper/0/1 [HC0[0]:SC0[0]:HE1:SE1] takes:
[    7.858465] ffff80001219f4d8 (&trig->leddev_list_lock){+?.+}-{0:0}, at: led_trigger_set+0x104/0x270
[    7.858482] {IN-HARDIRQ-R} state was registered at:
[    7.858484]   lock_acquire+0xec/0x468
[    7.858491]   rt_read_lock+0xb0/0x108
[    7.858497]   led_trigger_event+0x34/0x88
[    7.858501]   mmc_request_done+0x3f0/0x450
[    7.858505]   meson_mmc_irq+0x284/0x378
[    7.858511]   __handle_irq_event_percpu+0xcc/0x4a8
[    7.858515]   handle_irq_event_percpu+0x60/0xb0
[    7.858519]   handle_irq_event+0x50/0x108
[    7.858522]   handle_fasteoi_irq+0xd0/0x180
[    7.858527]   generic_handle_irq+0x38/0x50
[    7.858530]   __handle_domain_irq+0x6c/0xc8
[    7.858533]   gic_handle_irq+0x5c/0xb8
[    7.858537]   el1_irq+0xbc/0x180
[    7.858540]   arch_cpu_idle+0x28/0x38
[    7.858544]   default_idle_call+0x90/0x3f0
[    7.858547]   do_idle+0x250/0x268
[    7.858551]   cpu_startup_entry+0x2c/0x78
[    7.858554]   rest_init+0x1b0/0x284
[    7.858559]   arch_call_rest_init+0x18/0x24
[    7.858565]   start_kernel+0x550/0x588
[    7.858569] irq event stamp: 1925495
[    7.858571] hardirqs last  enabled at (1925495): [<ffff8000111e3ba4>] _raw_spin_unlock_irqrestore+0xa4/0xb0
[    7.858576] hardirqs last disabled at (1925494): [<ffff8000111e3c58>] _raw_spin_lock_irqsave+0xa8/0xb8
[    7.858580] softirqs last  enabled at (1857856): [<ffff80001024705c>] bdi_register_va+0x114/0x368
[    7.858586] softirqs last disabled at (1857849): [<ffff80001024705c>] bdi_register_va+0x114/0x368
[    7.858590]
               other info that might help us debug this:
[    7.858592]  Possible unsafe locking scenario:

[    7.858594]        CPU0
[    7.858595]        ----
[    7.858597]   lock(&trig->leddev_list_lock);
[    7.858600]   <Interrupt>
[    7.858602]     lock(&trig->leddev_list_lock);
[    7.858604]
                *** DEADLOCK ***

[    7.858606] 3 locks held by swapper/0/1:
[    7.858609]  #0: ffff80001219eb30 (leds_list_lock){++++}-{0:0}, at: led_trigger_register+0xf4/0x1c0
[    7.858619]  #1: ffff0000b0696a70 (&led_cdev->trigger_lock){+.+.}-{0:0}, at: led_trigger_register+0x134/0x1c0
[    7.858629]  #2: ffff800011fb83d0 (rcu_read_lock){....}-{1:2}, at: rt_write_lock+0x8/0x108
[    7.858637]
               stack backtrace:
[    7.858640] CPU: 5 PID: 1 Comm: swapper/0 Not tainted 5.9.0-rc3-rt3+ #33
[    7.858643] Hardware name: Hardkernel ODROID-N2Plus (DT)
[    7.858646] Call trace:
[    7.858647]  dump_backtrace+0x0/0x1e8
[    7.858650]  show_stack+0x20/0x30
[    7.858653]  dump_stack+0xf0/0x164
[    7.858659]  print_usage_bug+0x2b4/0x2c0
[    7.858662]  mark_lock+0x2e8/0x360
[    7.858665]  __lock_acquire+0x238/0x1858
[    7.858669]  lock_acquire+0xec/0x468
[    7.858672]  rt_write_lock+0xb0/0x108
[    7.858675]  led_trigger_set+0x104/0x270
[    7.858678]  led_trigger_register+0x180/0x1c0
[    7.858681]  heartbeat_trig_init+0x28/0x5c
[    7.858686]  do_one_initcall+0x90/0x4bc
[    7.858690]  kernel_init_freeable+0x2cc/0x338
[    7.858694]  kernel_init+0x1c/0x11c
[    7.858697]  ret_from_fork+0x10/0x34