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ACPI: PAD: xen: 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
Xen variant of the ACPI processor aggregator device (PAD) driver.

Fixes: 112b2f978a ("ACPI: PAD: xen: Convert to a platform driver")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Juergen Gross <jgross@suse.com>
Link: https://patch.msgid.link/3427762.aeNJFYEL58@rafael.j.wysocki
This commit is contained in:
Rafael J. Wysocki
2026-05-12 18:25:17 +02:00
parent e4865a56d0
commit b7cdd59de5
1 changed files with 5 additions and 1 deletions
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6
drivers/xen/xen-acpi-pad.c
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@@ -110,9 +110,13 @@ static void acpi_pad_notify(acpi_handle handle, u32 event,
static int acpi_pad_probe(struct platform_device *pdev)
{
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
struct acpi_device *device;
acpi_status status;
device = ACPI_COMPANION(&pdev->dev);
if (!device)
return -ENODEV;
strcpy(acpi_device_name(device), ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PROCESSOR_AGGREGATOR_CLASS);