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platform/x86: intel/rst: Check ACPI_COMPANION() against NULL

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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
platform/x86 intel/rst driver.

Fixes: 163a68a31f ("platform/x86: intel/rst: Convert ACPI driver to a platform one")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/2051525.PYKUYFuaPT@rafael.j.wysocki
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2026-05-12 16:11:00 +02:00 committed by Ilpo Järvinen
parent ab743c6d7b
commit 51e91ad0a0
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 5 additions and 1 deletions
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6
drivers/platform/x86/intel/rst.c
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@ -102,9 +102,13 @@ static struct device_attribute irst_timeout_attr = {
static int irst_probe(struct platform_device *pdev)
{
struct acpi_device *acpi = ACPI_COMPANION(&pdev->dev);
struct acpi_device *acpi;
int error;
acpi = ACPI_COMPANION(&pdev->dev);
if (!acpi)
return -ENODEV;
error = device_create_file(&acpi->dev, &irst_timeout_attr);
if (unlikely(error))
return error;