Hello,
FWIW I'm seeing this splat too on STM32MP157 with 6.8.0-rc5 (from wireless tree). It happens systematically a few seconds after link up
[ 27.884703] ================================
[ 27.888988] WARNING: inconsistent lock state
[ 27.893271] 6.8.0-rc5-g59460f7f45e6-dirty #16 Not tainted
[ 27.898671] --------------------------------
[ 27.902951] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
[ 27.908954] swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
[ 27.914155] d7b764ac (&syncp->seq#3){?.-.}-{0:0}, at: dwmac4_dma_interrupt+0xc4/0x2a8
[ 27.921974] {HARDIRQ-ON-W} state was registered at:
[ 27.926863] lock_acquire+0x12c/0x388
[ 27.930563] __u64_stats_update_begin+0x138/0x214
[ 27.935372] stmmac_xmit+0x55c/0xd80
[ 27.939064] dev_hard_start_xmit+0xec/0x2f4
[ 27.943362] sch_direct_xmit+0x94/0x310
[ 27.947255] __dev_queue_xmit+0x3f8/0xd04
[ 27.951347] ip6_finish_output2+0x2fc/0xbc0
[ 27.955642] mld_sendpack+0x268/0x594
[ 27.959329] mld_ifc_work+0x268/0x568
[ 27.963115] process_one_work+0x20c/0x618
[ 27.967216] worker_thread+0x1e8/0x4ac
[ 27.971009] kthread+0x110/0x130
[ 27.974296] ret_from_fork+0x14/0x28
[ 27.977982] irq event stamp: 12456
[ 27.981353] hardirqs last enabled at (12455): [<c08e3558>] default_idle_call+0x1c/0x2cc
[ 27.989507] hardirqs last disabled at (12456): [<c0100b74>] __irq_svc+0x54/0xd0
[ 27.996844] softirqs last enabled at (12440): [<c010162c>] __do_softirq+0x318/0x4dc
[ 28.004586] softirqs last disabled at (12429): [<c012b2a8>] __irq_exit_rcu+0x130/0x184
[ 28.012530]
[ 28.012530] other info that might help us debug this:
[ 28.019040] Possible unsafe locking scenario:
[ 28.019040]
[ 28.025043] CPU0
[ 28.027400] ----
[ 28.029857] lock(&syncp->seq#3);
[ 28.033253] <Interrupt>
[ 28.035912] lock(&syncp->seq#3);
[ 28.039410]
[ 28.039410] *** DEADLOCK ***
[ 28.039410]
[ 28.045416] no locks held by swapper/0/0.
[ 28.049395]
[ 28.049395] stack backtrace:
[ 28.053781] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-rc5-g59460f7f45e6-dirty #16
[ 28.061819] Hardware name: STM32 (Device Tree Support)
[ 28.066918] unwind_backtrace from show_stack+0x18/0x1c
[ 28.072140] show_stack from dump_stack_lvl+0x58/0x70
[ 28.077253] dump_stack_lvl from mark_lock+0xc40/0x12fc
[ 28.082478] mark_lock from __lock_acquire+0x968/0x2c20
[ 28.087703] __lock_acquire from lock_acquire+0x12c/0x388
[ 28.093131] lock_acquire from __u64_stats_update_begin+0x138/0x214
[ 28.099372] __u64_stats_update_begin from dwmac4_dma_interrupt+0xc4/0x2a8
[ 28.106219] dwmac4_dma_interrupt from stmmac_napi_check+0x48/0x1d0
[ 28.112558] stmmac_napi_check from stmmac_interrupt+0xa4/0x184
[ 28.118490] stmmac_interrupt from __handle_irq_event_percpu+0xb0/0x308
[ 28.125036] __handle_irq_event_percpu from handle_irq_event+0x40/0x88
[ 28.131578] handle_irq_event from handle_fasteoi_irq+0xa4/0x258
[ 28.137610] handle_fasteoi_irq from generic_handle_domain_irq+0x30/0x40
[ 28.144348] generic_handle_domain_irq from gic_handle_irq+0x7c/0x90
[ 28.150682] gic_handle_irq from generic_handle_arch_irq+0x34/0x44
[ 28.156911] generic_handle_arch_irq from __irq_svc+0x8c/0xd0
[ 28.162631] Exception stack(0xc2201f30 to 0xc2201f78)
[ 28.167732] 1f20: ffffffff ffffffff 00000001 000030a7
[ 28.175974] 1f40: c220c780 c0178dc4 c2208d54 c22c2e10 00000000 00000000 c0b06d28 c220c22c
[ 28.184114] 1f60: 00000000 c2201f80 c08e3558 c08e355c 600f0013 ffffffff
[ 28.190727] __irq_svc from default_idle_call+0x20/0x2cc
[ 28.196045] default_idle_call from do_idle+0xd8/0x144
[ 28.201165] do_idle from cpu_startup_entry+0x30/0x34
[ 28.206181] cpu_startup_entry from rest_init+0xf4/0x198
[ 28.211502] rest_init from arch_post_acpi_subsys_init+0x0/0x18
--
Alexis Lothoré, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
