linux-kernel - Re: [PATCH 0/3] Revert "revocable: Revocable resource management"

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Message-Id: <DG1FF2VY54AO.2Q3YHA4WNLV5C@kernel.org>
Date: Thu, 29 Jan 2026 23:29:03 +0100
From: "Danilo Krummrich" <dakr@...nel.org>
To: "Laurent Pinchart" <laurent.pinchart@...asonboard.com>
Cc: "Jason Gunthorpe" <jgg@...dia.com>, "Bartosz Golaszewski"
 <bartosz.golaszewski@....qualcomm.com>, "Johan Hovold" <johan@...nel.org>,
 "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>, "Rafael J . Wysocki"
 <rafael@...nel.org>, "Tzung-Bi Shih" <tzungbi@...nel.org>, "Linus Walleij"
 <linusw@...nel.org>, "Jonathan Corbet" <corbet@....net>, "Shuah Khan"
 <shuah@...nel.org>, "Wolfram Sang" <wsa+renesas@...g-engineering.com>,
 "Simona Vetter" <simona.vetter@...ll.ch>, "Dan Williams"
 <dan.j.williams@...el.com>, <linux-doc@...r.kernel.org>,
 <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Bartosz
 Golaszewski" <brgl@...nel.org>, <maarten.lankhorst@...ux.intel.com>,
 <mripard@...nel.org>, <tzimmermann@...e.de>
Subject: Re: [PATCH 0/3] Revert "revocable: Revocable resource management"

(Cc: Maxime, Thomas, Maarten)

On Thu Jan 29, 2026 at 2:08 AM CET, Laurent Pinchart wrote:
> That's what I've been advocating for. The best way to ensure that driver
> code will not accessed data freed at .remove() time is to prevent the
> code to run at all.

With this we are in full agreement, I think that'd be best too. But, I also
think that sometimes this isn't possible. For instance, DRM has such a case with
atomic mode setting.