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platform/x86: fujitsu-tablet: Check ACPI_COMPANION() against NULL 

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 requisite ACPI_COMPANION() checks against NULL to the
platform/x86 fujitsu-tablet driver.

Fixes: bd13b265d3 ("platform/x86: fujitsu-tablet: 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/10861611.nUPlyArG6x@rafael.j.wysocki
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
master
Rafael J. Wysocki 2026-05-12 16:09:58 +02:00 committed by Ilpo Järvinen
parent e99829a159
commit ab743c6d7b
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1 changed files with 5 additions and 1 deletions
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6
drivers/platform/x86/fujitsu-tablet.c
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@ -445,10 +445,14 @@ static acpi_status fujitsu_walk_resources(struct acpi_resource *res, void *data)
static int acpi_fujitsu_probe(struct platform_device *pdev)
{
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
struct acpi_device *adev;
acpi_status status;
int error;
adev = ACPI_COMPANION(&pdev->dev);
if (!adev)
return -ENODEV;
status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
fujitsu_walk_resources, NULL);
if (ACPI_FAILURE(status) || !fujitsu.irq || !fujitsu.io_base)