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

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Message-ID: <CAJZ5v0iT_SgQPP6R8Ys37h80Db7aDu7o0UaVW1EeiN=TtV+Lbg@mail.gmail.com>
Date: Sun, 7 Dec 2025 12:23:04 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Bart Van Assche <bvanassche@....org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, linux-pm@...r.kernel.org, 
	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 Fri, Dec 5, 2025 at 8:11 PM Bart Van Assche <bvanassche@....org> wrote:
>
> 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.

Rather, the work item queued by it will not make progress.

OK, I'll add this information to the patch changelog while applying it.

> Otherwise this patch looks good to me.

Thank you!