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sonypi: Check ACPI_COMPANION() against NULL at probe time

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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
sonypi driver.

Fixes: 7e488b0af0 ("sonypi: Convert ACPI driver to a platform one")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/5087721.GXAFRqVoOG@rafael.j.wysocki
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rafael J. Wysocki 2026-05-12 18:20:53 +02:00 committed by Greg Kroah-Hartman
parent fa5e295234
commit 950f35211b
1 changed files with 5 additions and 1 deletions
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6
drivers/char/sonypi.c
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@ -1117,7 +1117,11 @@ static int sonypi_disable(void)
#ifdef CONFIG_ACPI
static int sonypi_acpi_probe(struct platform_device *pdev)
{
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
struct acpi_device *device;
device = ACPI_COMPANION(&pdev->dev);
if (!device)
return -ENODEV;
sonypi_acpi_device = device;
strcpy(acpi_device_name(device), "Sony laptop hotkeys");