ACPI / container: Fix error code path in container_device_attach()

To avoid leaking memory on errors from device_register(), do a
put_device() on the device object in question in the error code
path of container_device_attach().

Fixes: caa73ea158de (ACPI / hotplug / driver core: Handle containers in a special way)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 0b6ae6eb5c4a..368f9ddb8480 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -79,9 +79,10 @@ static int container_device_attach(struct acpi_device *adev,
         ACPI_COMPANION_SET(dev, adev);
         dev->release = acpi_container_release;
         ret = device_register(dev);
-        if (ret)
+        if (ret) {
+                put_device(dev);
                 return ret;
-
+        }
         adev->driver_data = dev;
         return 1;
 }