From f15b0a3043f193677903be52d7dbef3d5c8df282 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 12 May 2026 16:13:13 +0200 Subject: [PATCH] platform/x86: panasonic-laptop: Check ACPI_COMPANION() against NULL MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 platform/x86 panasonic-laptop driver. Fixes: de6837243af0 ("platform/x86: panasonic-laptop: Convert ACPI driver to a platform one") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/3353471.5fSG56mABF@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- drivers/platform/x86/panasonic-laptop.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index 1337f7c49805..b83113c26f88 100644 --- a/drivers/platform/x86/panasonic-laptop.c +++ b/drivers/platform/x86/panasonic-laptop.c @@ -981,11 +981,15 @@ static int acpi_pcc_hotkey_resume(struct device *dev) static int acpi_pcc_hotkey_probe(struct platform_device *pdev) { - struct acpi_device *device = ACPI_COMPANION(&pdev->dev); struct backlight_properties props; + struct acpi_device *device; struct pcc_acpi *pcc; int num_sifr, result; + device = ACPI_COMPANION(&pdev->dev); + if (!device) + return -ENODEV; + num_sifr = acpi_pcc_get_sqty(device); /*