On Fri, Mar 28, 2025 at 02:10:53PM -0400, Valdis Klētnieks wrote:
> Saw this during boot on a Dell Inspiron 5559 laptop.
>
> In addition, the external USB ports all gave up, rendering a USB mouse and a
> USB external drive totally dead in the water. May or may not be related, I didn't
> dig too far into it.
It shouldn't be related to the warning.
>
> [ 40.842033] [ T953] io scheduler bfq registered
>
> [ 41.022391] [ T817] ======================================================
> [ 41.103507] [ T817] WARNING: possible circular locking dependency detected
> [ 41.184587] [ T817] 6.14.0-next-20250327 #110 Tainted: G I T
> [ 41.265700] [ T817] ------------------------------------------------------
> [ 41.346832] [ T817] (udev-worker)/817 is trying to acquire lock:
> [ 41.427952] [ T817] ffff93a2c80ae9f0 (&q->elevator_lock){+.+.}-{4:4}, at: elv_iosched_store+0xe1/0x260
> [ 41.830112] [ T817]
> but task is already holding lock:
> [ 41.912022] [ T817] ffff93a2c80ae460 (&q->q_usage_counter(io)#10){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x11/0x20
For this lockdep warning, feel free to try patch in the following link:
https://lore.kernel.org/linux-block/Z-dUCLvf06SfTOHy@fedora/
Thanks,
Ming
