Commit b7cdd59d authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

ACPI: PAD: xen: 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 a requisite ACPI_COMPANION() check against NULL to the
Xen variant of the ACPI processor aggregator device (PAD) driver.

Fixes: 112b2f97 ("ACPI: PAD: xen: Convert to a platform driver")
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarJuergen Gross <jgross@suse.com>
Link: https://patch.msgid.link/3427762.aeNJFYEL58@rafael.j.wysocki
parent e4865a56

drivers/xen/xen-acpi-pad.c

+5 −1
Original line number Diff line number Diff line
@@ -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);