From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E33120E334; Mon, 11 May 2026 19:54:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778529295; cv=none; b=GdaLvkVDlBoIQ5RuqYBQT9ET3Jb+Jc5DyodFFP1VMvp17YbXnpbbh21Fe3IaOWDNdOz5XQzgQpDFZVrEd/Ko+Py5pGz1It/zUwGJ3VvrDcTCDzqxJwT+OIUn6ZhnWPUsmhSB2y1686xLhiTtaiO2lQg4+mOplNBjoSp+2ZtwXLk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778529295; c=relaxed/simple; bh=SmycbUfU5q/ceSLi9AUZnde3P/EFVo+BHXzp2TdjABc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=jtE/9FM2TknTKn4sZBNGjCVa7AZx/boY7vsV3952fLlBDeel4q9YfRnVkJslb73tydsR1LEjUX9wsRYW/IpX23YWIqoEtkQfGuhPqd0ihGdwGwT4vfk5NEqMjYndnUNlCkDf0xoQttuztndtGDLDZVk7XAcLubiRZTzwxdYvyEg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TSeuP0Sw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TSeuP0Sw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9EE97C2BCB0; Mon, 11 May 2026 19:54:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778529295; bh=SmycbUfU5q/ceSLi9AUZnde3P/EFVo+BHXzp2TdjABc=; h=From:To:Cc:Subject:Date:From; b=TSeuP0SwSU++DiMKa3ziOZHaiJ8VSgg9UgrphBJvtTMzFy+jK6T22Mh4RCN8kpOd0 3ChOF3mJWUhL9LNhsJHR//8H6NuX9v3U+RNYjfFt1tfFsHOdU12pxQT+R1FA3oaw1v WlQPxXmCuJMIEZBCZvMwjacvxhxD137E6ocxLmk2xvv7mIbHQ5zW1OKR0Qq4mmuTVy +Jb/yo53RHZXIX+Q+octytrR7NA8KX3WsMkh+/8neTqBY4p6e8REYzerLyegSZvF8r t5Tkf9WvNVDje+o2UhC8K0Dn7p7ST0t2vCjIqnejnUXlutTv8TF5W41lWCQfCLLAoJ evBg+bUNRbbXQ== From: "Rafael J. Wysocki" To: Guenter Roeck Cc: linux-hwmon@vger.kernel.org, LKML , Linux ACPI , Andy Shevchenko , Linux PM Subject: [PATCH v1] hwmon: (acpi_power_meter) Check ACPI_COMPANION() against NULL Date: Mon, 11 May 2026 21:54:51 +0200 Message-ID: <5068745.GXAFRqVoOG@rafael.j.wysocki> Organization: Linux Kernel Development Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="UTF-8" From: "Rafael J. Wysocki" 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 a requisite ACPI_COMPANION() check against NULL to the acpi_power_meter hwmon driver. Fixes: afc6c4aedea5 ("hwmon: (acpi_power_meter) Convert ACPI driver to a platform one") Signed-off-by: Rafael J. Wysocki --- drivers/hwmon/acpi_power_meter.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/hwmon/acpi_power_meter.c +++ b/drivers/hwmon/acpi_power_meter.c @@ -884,10 +884,14 @@ static void acpi_power_meter_notify(acpi static int acpi_power_meter_probe(struct platform_device *pdev) { - struct acpi_device *device = ACPI_COMPANION(&pdev->dev); struct acpi_power_meter_resource *resource; + struct acpi_device *device; int res; + device = ACPI_COMPANION(&pdev->dev); + if (!device) + return -ENODEV; + resource = kzalloc_obj(*resource); if (!resource) return -ENOMEM;