Hit a "deadklock".

I assume it's more likely that the firmware went kaboom after this
athp0: ath10k_htt_rx_delba: received DELBA, couldn't find node!
and we didn't move anymore?

db> trace 100166
Tracing pid 0 tid 100166 td 0xfffffe003b99be00
sched_switch() at sched_switch+0x5b2/frame 0xfffffe003c0098e0
mi_switch() at mi_switch+0x155/frame 0xfffffe003c009900
__mtx_lock_sleep() at __mtx_lock_sleep+0x1cc/frame 0xfffffe003c009990
__mtx_lock_flags() at __mtx_lock_flags+0xe5/frame 0xfffffe003c0099e0
ath10k_wait_for_peer_common() at ath10k_wait_for_peer_common+0xe3/frame 0xfffffe003c009a40
athp_peer_free() at athp_peer_free+0xfb/frame 0xfffffe003c009a80
athp_node_free_cb() at athp_node_free_cb+0x84/frame 0xfffffe003c009ac0
athp_taskq_task() at athp_taskq_task+0x2fe/frame 0xfffffe003c009b00
taskqueue_run_locked() at taskqueue_run_locked+0xaa/frame 0xfffffe003c009b80
taskqueue_thread_loop() at taskqueue_thread_loop+0x94/frame 0xfffffe003c009bb0
fork_exit() at fork_exit+0x80/frame 0xfffffe003c009bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe003c009bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
db> trace 100160
Tracing pid 12 tid 100160 td 0xfffffe003b98f700
sched_switch() at sched_switch+0x5b2/frame 0xfffffe003b1e9810
mi_switch() at mi_switch+0x155/frame 0xfffffe003b1e9830
__mtx_lock_sleep() at __mtx_lock_sleep+0x1cc/frame 0xfffffe003b1e98c0
__mtx_lock_flags() at __mtx_lock_flags+0xe5/frame 0xfffffe003b1e9910
ath10k_get_arvif() at ath10k_get_arvif+0x2e/frame 0xfffffe003b1e9940
ath10k_htt_t2h_msg_handler() at ath10k_htt_t2h_msg_handler+0x374/frame 0xfffffe003b1e99b0
ath10k_htc_rx_completion_handler() at ath10k_htc_rx_completion_handler+0x203/frame 0xfffffe003b1e9a40
ath10k_pci_ce_recv_data() at ath10k_pci_ce_recv_data+0xff/frame 0xfffffe003b1e9ac0
ath10k_ce_per_engine_service() at ath10k_ce_per_engine_service+0x8c/frame 0xfffffe003b1e9b00
ath10k_pci_ce_tasklet() at ath10k_pci_ce_tasklet+0x55/frame 0xfffffe003b1e9b20
ithread_loop() at ithread_loop+0x279/frame 0xfffffe003b1e9bb0
fork_exit() at fork_exit+0x80/frame 0xfffffe003b1e9bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe003b1e9bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
db> trace 100161
Tracing pid 12 tid 100161 td 0xfffffe003b98f000
sched_switch() at sched_switch+0x5b2/frame 0xfffffe003b1ee540
mi_switch() at mi_switch+0x155/frame 0xfffffe003b1ee560
__mtx_lock_sleep() at __mtx_lock_sleep+0x1cc/frame 0xfffffe003b1ee5f0
__mtx_lock_flags() at __mtx_lock_flags+0xe5/frame 0xfffffe003b1ee640
ath10k_get_arvif() at ath10k_get_arvif+0x2e/frame 0xfffffe003b1ee670
ath10k_wmi_event_host_swba() at ath10k_wmi_event_host_swba+0x1a9/frame 0xfffffe003b1ee910
ath10k_wmi_10_2_op_rx() at ath10k_wmi_10_2_op_rx+0x2b9/frame 0xfffffe003b1ee9b0
ath10k_htc_rx_completion_handler() at ath10k_htc_rx_completion_handler+0x203/frame 0xfffffe003b1eea40
ath10k_pci_ce_recv_data() at ath10k_pci_ce_recv_data+0xff/frame 0xfffffe003b1eeac0
ath10k_ce_per_engine_service() at ath10k_ce_per_engine_service+0x8c/frame 0xfffffe003b1eeb00
ath10k_pci_ce_tasklet() at ath10k_pci_ce_tasklet+0x55/frame 0xfffffe003b1eeb20
ithread_loop() at ithread_loop+0x279/frame 0xfffffe003b1eebb0
fork_exit() at fork_exit+0x80/frame 0xfffffe003b1eebf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe003b1eebf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---