linux-kernel - Re: [PATCH v2] PM: sleep: Do not flag runtime PM workqueue as freezable

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Message-ID: <fcecd822-a2ec-43e6-8dc4-290516e2187d@acm.org>
Date: Fri, 5 Dec 2025 09:10:51 -1000
From: Bart Van Assche <bvanassche@....org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, linux-pm@...r.kernel.org
Cc: YangYang <yang.yang@...o.com>, Jens Axboe <axboe@...nel.dk>,
 linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
 Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH v2] PM: sleep: Do not flag runtime PM workqueue as
 freezable

On 12/5/25 5:24 AM, Rafael J. Wysocki wrote:
> For example, it has been reported that blk_queue_enter() may deadlock
> during a system suspend transition because of the pm_request_resume()
> usage in it [1].

System resume is also affected. If pm_request_resume() is called before
the device it applies to is resumed by the system resume code then the
pm_request_resume() call also hangs.

Otherwise this patch looks good to me.

Thanks,

Bart.