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Feedback-ID: i8771445c:Fastmail
Date:   Thu, 11 May 2023 10:44:09 +0200
From:   Maxime Ripard <maxime@cerno.tech>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>
Cc:     Brendan Higgins <brendan.higgins@linux.dev>,
        David Gow <davidgow@google.com>,
        linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] drivers: base: Add tests showing devm handling
 inconsistencies
Message-ID: <7rjlinncexvux7qyx5ochk23tstalslfmh6rpqtz7dofuk3jwk@q3bsgi3lixzk>
References: <20230329-kunit-devm-inconsistencies-test-v1-0-c33127048375@cerno.tech>
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On Wed, Mar 29, 2023 at 08:38:30PM +0100, Maxime Ripard wrote:
> Hi,
>=20
> This follows the discussion here:
> https://lore.kernel.org/linux-kselftest/20230324123157.bbwvfq4gsxnlnfwb@h=
ouat/
>=20
> This shows a couple of inconsistencies with regard to how device-managed
> resources are cleaned up. Basically, devm resources will only be cleaned =
up
> if the device is attached to a bus and bound to a driver. Failing any of
> these cases, a call to device_unregister will not end up in the devm
> resources being released.
>=20
> We had to work around it in DRM to provide helpers to create a device for
> kunit tests, but the current discussion around creating similar, generic,
> helpers for kunit resumed interest in fixing this.
>=20
> This can be tested using the command:
> ./tools/testing/kunit/kunit.py run --kunitconfig=3Ddrivers/base/test/
>=20
> Let me know what you think,
> Maxime
>=20
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Ping?

How can we move this forward?

Maxime

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