On Fri, Nov 26, 2021 at 11:38 AM Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote: > > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \ > acpi-5.16-rc3 Hmm. This may be unrelated, but I don't think I've seen this before.. On my laptop, I get WARNING: CPU: 4 PID: 95940 at kernel/workqueue.c:1441 __queue_work+0x2f9/0x3b0 Workqueue: kec_query acpi_ec_event_processor .. Call Trace: <TASK> queue_work_on+0x20/0x30 advance_transaction+0x1a1/0x500 acpi_ec_transaction+0x15c/0x410 acpi_ec_space_handler+0xd2/0x270 acpi_ev_address_space_dispatch+0x216/0x2a3 ? acpi_ec_resume+0x20/0x20 acpi_ex_access_region+0x1dc/0x255 ? acpi_os_wait_semaphore+0x48/0x70 acpi_ex_field_datum_io+0xfd/0x178 acpi_ex_read_data_from_field+0x12e/0x171 acpi_ex_resolve_node_to_value+0x1fe/0x281 acpi_ds_evaluate_name_path+0x75/0xe9 acpi_ds_exec_end_op+0x8f/0x411 acpi_ps_parse_loop+0x495/0x5bc acpi_ps_parse_aml+0x94/0x2c2 acpi_ps_execute_method+0x15e/0x193 acpi_ns_evaluate+0x1c6/0x25d acpi_evaluate_object+0x12e/0x226 acpi_ec_event_processor+0x63/0x90 process_one_work+0x217/0x3c0 and it seems to be happening at resume time. This was when running a51e3ac43ddb, so not the very latest git tree, but recent. Maybe I've missed a report of this? Linus