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From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Ilpo =?ISO-8859-1?Q?J=E4rvinen?= <ilpo.jarvinen@linux.intel.com>
Cc: Hans de Goede <hansg@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
 Linux ACPI <linux-acpi@vger.kernel.org>,
 Corentin Chary <corentin.chary@gmail.com>, "Luke D. Jones" <luke@ljones.dev>,
 Denis Benato <denis.benato@linux.dev>,
 Pali =?ISO-8859-1?Q?Roh=E1r?= <pali@kernel.org>,
 Jonathan Woithe <jwoithe@just42.net>, Robert Gerlach <khnz@gmx.de>,
 Matan Ziv-Av <matan@svgalib.org>, Kenneth Chan <kenneth.t.chan@gmail.com>,
 Mattia Dongili <malattia@linux.it>, Jeremy Soller <jeremy@system76.com>,
 Azael Avalos <coproscefalo@gmail.com>,
 Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
 platform-driver-x86@vger.kernel.org
Subject:
 [PATCH v2 00/16] platform/x86: Check ACPI_COMPANION() against NULL during
 probe
Date: Tue, 12 May 2026 16:01:43 +0200
Message-ID: <12904885.O9o76ZdvQC@rafael.j.wysocki>
Organization: Linux Kernel Development
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Hi All,

This series replaces

https://lore.kernel.org/linux-acpi/5990022.DvuYhMxLoT@rafael.j.wysocki/

and, as a whole, it makes exactly the same code changes.

Every platform driver can be forced to match a device that doesn't match
its list of device IDs because of device_match_driver_override(), so
platform drivers that rely on the existence of a device's ACPI companion
object need to verify its presence.

Accordingly, requisite ACPI_COMPANION() or ACPI_HANDLE() checks against NULL
are added to multiple platform/x86 drivers that have been converted to platform
drivers from ACPI drivers recently.

Thanks!