From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

Use the newly introduced devm_acpi_install_notify_handler() for
installing an ACPI notify handler and since that function checks the
ACPI companion of the owner device against NULL internally, remove the
the explicit ACPI companion check from acpi_hed_probe().

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/hed.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/acpi/hed.c b/drivers/acpi/hed.c
index 4b5dc95922ea..48562f53d3ab 100644
--- a/drivers/acpi/hed.c
+++ b/drivers/acpi/hed.c
@@ -50,19 +50,14 @@ static void acpi_hed_notify(acpi_handle handle, u32 event, void *data)
 
 static int acpi_hed_probe(struct platform_device *pdev)
 {
-	struct acpi_device *device;
 	int err;
 
-	device = ACPI_COMPANION(&pdev->dev);
-	if (!device)
-		return -ENODEV;
-
 	/* Only one hardware error device */
 	if (hed_present)
 		return -EINVAL;
 
-	err = acpi_dev_install_notify_handler(device, ACPI_DEVICE_NOTIFY,
-					      acpi_hed_notify, device);
+	err = devm_acpi_install_notify_handler(&pdev->dev, ACPI_DEVICE_NOTIFY,
+					       acpi_hed_notify, NULL);
 	if (err)
 		return err;
 
@@ -72,11 +67,7 @@ static int acpi_hed_probe(struct platform_device *pdev)
 
 static void acpi_hed_remove(struct platform_device *pdev)
 {
-	struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
-
 	hed_present = false;
-	acpi_dev_remove_notify_handler(device, ACPI_DEVICE_NOTIFY,
-				       acpi_hed_notify);
 }
 
 static struct platform_driver acpi_hed_driver = {
-- 
2.51.0