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From:   Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To:     Saravana Kannan <saravanak@google.com>
Cc:     Nathan Chancellor <nathan@kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
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        Mark Brown <broonie@kernel.org>, Pavel Machek <pavel@ucw.cz>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
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        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-s390@vger.kernel.org, John Stultz <jstultz@google.com>
Subject: Re: [PATCH v1] driver core: Extend deferred probe timeout on driver
 registration
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On 2022-05-23 20:43:06 [-0700], Saravana Kannan wrote:
=E2=80=A6
> Thanks for all the help. I think I know what's going on.

I, too got here because my boot recently was extended by 10 seconds and
bisected to that commit in question.

> If you revert the following commit, then you'll see that your device
> no longer hangs with my changes.
> 35a672363ab3 driver core: Ensure wait_for_device_probe() waits until
> the deferred_probe_timeout fires

Removing probe_timeout_waitqueue (as suggested) or setting the timeout
to 0 avoids the delay.

> -Saravana

Sebastian