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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>,
 Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
 platform-driver-x86@vger.kernel.org, Andrea Ho <Andrea.Ho@advantech.com.tw>,
 Eric Piel <eric.piel@tremplin-utc.net>, Alex Hung <alexhung@gmail.com>,
 Shravan Sudhakar <s.shravan@intel.com>, AceLan Kao <acelan.kao@canonical.com>
Subject:
 [PATCH v2 0/5] platform/x86: Check ACPI_COMPANION() or ACPI_HANDLE() against
 NULL
Date: Tue, 12 May 2026 17:10:35 +0200
Message-ID: <6007701.DvuYhMxLoT@rafael.j.wysocki>
Organization: Linux Kernel Development
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Hi All,

This series replaces

https://lore.kernel.org/linux-acpi/4731840.LvFx2qVVIh@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, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks
against NULL to 5 platform/x86 drivers where they are missing.

Thanks!