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Date: Thu, 29 Jan 2026 23:29:03 +0100
Message-Id: <DG1FF2VY54AO.2Q3YHA4WNLV5C@kernel.org>
Cc: "Jason Gunthorpe" <jgg@nvidia.com>, "Bartosz Golaszewski"
 <bartosz.golaszewski@oss.qualcomm.com>, "Johan Hovold" <johan@kernel.org>,
 "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "Rafael J . Wysocki"
 <rafael@kernel.org>, "Tzung-Bi Shih" <tzungbi@kernel.org>, "Linus Walleij"
 <linusw@kernel.org>, "Jonathan Corbet" <corbet@lwn.net>, "Shuah Khan"
 <shuah@kernel.org>, "Wolfram Sang" <wsa+renesas@sang-engineering.com>,
 "Simona Vetter" <simona.vetter@ffwll.ch>, "Dan Williams"
 <dan.j.williams@intel.com>, <linux-doc@vger.kernel.org>,
 <linux-kselftest@vger.kernel.org>, <linux-kernel@vger.kernel.org>, "Bartosz
 Golaszewski" <brgl@kernel.org>, <maarten.lankhorst@linux.intel.com>,
 <mripard@kernel.org>, <tzimmermann@suse.de>
To: "Laurent Pinchart" <laurent.pinchart@ideasonboard.com>
From: "Danilo Krummrich" <dakr@kernel.org>
Subject: Re: [PATCH 0/3] Revert "revocable: Revocable resource management"
References: <20260124170535.11756-1-johan@kernel.org>
 <DFX20SA67PF2.VONCFNDOZOZT@kernel.org>
 <2026012554-chatty-policy-42a1@gregkh>
 <aXdxDBXdyqLFfKKI@hovoldconsulting.com>
 <CAESzEGiA2DSp79pkjxBA5X-DWmSAAgyAF7usKn253jkGpYJMew@mail.gmail.com>
 <20260127235232.GS1134360@nvidia.com> <20260129010822.GA3310904@killaraus>
In-Reply-To: <20260129010822.GA3310904@killaraus>

(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.