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 C1D333CC7E3; Tue, 12 May 2026 16:28:29 +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=1778603309; cv=none; b=i/hAHWljUKD5Hl1ZiQmNYmkd8z5O+2hTSvIzg36dI4d6JtggQDVYgXpCbqInkrAqIzmVHmqziozwGR6HrJmJFUK5d34kpgT9IK+wOoM3209s4HD2qyo7hbfMpS2lZFm88HlmMW4qSPIiD0rMEq/fEhX0EPkL/kG2NU4gm0ezTQY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778603309; c=relaxed/simple; bh=Wa7NpHKF7nL0Sj9JFI+m2JxaqGNaZ9G47B8JXLkGCI4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=evzUhoqsJNMvSe8NfBLE6qErqDKL0mV8Hty7BBpDtLEay6K0NtwEX6vmYgYw7vv+SlXcUn+YsKGEMvsPvPCFQLnmsNTjRkCYJttfGc5b2Z0cjwOuGLAyihI1H4PIBVzRFpOHgNCFMbxhjxQahXQPJJxZjofrB7LA6GSUxbMl+uA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=M79RpxzT; 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="M79RpxzT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77382C2BCB0; Tue, 12 May 2026 16:28:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778603309; bh=Wa7NpHKF7nL0Sj9JFI+m2JxaqGNaZ9G47B8JXLkGCI4=; h=From:To:Cc:Subject:Date:From; b=M79RpxzT/Uhk3aRFTzqnwo3CmoqLKZilsk2rHUh2s/5Y7GSGU15MKpAj+KNfT/K3r tIJg4GfaUbC2Dd0KXcVvwJdZCnojuTQ3YE0tGgf9ZnfWkB3jZBsobRiPaV9vjXHcD8 4jdt0072dhG3F7EDPA4Dzx7dznjyRQ3QI3ssC/98VZzBa6IMlqI0Yot4g0aO3kFb6e LyJ6SCr3hSzhw9GXyfTmhZGuGndzXcaVmvl9MXcXw6OhTwLS9GIShN4MBhXTk5Y4co UYOHxKtvBbRGKE8SVOypK5MRZOVHlAHlIQ0BOTHFM6hTr0fY+8L4Nsvt+ojGdWcJbn XrdzcdP+NdBmQ== From: "Rafael J. Wysocki" To: Jonathan Cameron Cc: linux-iio@vger.kernel.org, LKML , Linux ACPI , Andy Shevchenko Subject: [PATCH v1] iio: light: acpi-als: Check ACPI_COMPANION() against NULL Date: Tue, 12 May 2026 18:28:26 +0200 Message-ID: <2366919.iZASKD2KPV@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-als IIO driver. Fixes: d4243cb08a27 ("iio: light: acpi-als: Convert ACPI driver to a platform one") Signed-off-by: Rafael J. Wysocki --- drivers/iio/light/acpi-als.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/iio/light/acpi-als.c +++ b/drivers/iio/light/acpi-als.c @@ -179,11 +179,15 @@ out: static int acpi_als_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct acpi_device *device = ACPI_COMPANION(dev); + struct acpi_device *device; struct iio_dev *indio_dev; struct acpi_als *als; int ret; + device = ACPI_COMPANION(dev); + if (!device) + return -ENODEV; + indio_dev = devm_iio_device_alloc(dev, sizeof(*als)); if (!indio_dev) return -ENOMEM;