[PATCH] media: pvrusb2: Fix USB parent device leak in class_dev_create()

[Wentao Liang]

class_dev_create() stores a reference to the USB device obtained with
get_device() in class_dev->parent, which class_dev_destroy() releases.
When device_register() fails the function only drops class_dev, so the
reference to the USB parent device is never released.

Drop the parent reference on the failure path as well.

Fixes: 28c4a5e6d324 ("V4L/DVB: pvrusb2: Fix USB parent device reference count")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/media/usb/pvrusb2/pvrusb2-sysfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c b/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
index dba43d4c24f2..678e069b4c92 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
@@ -633,6 +633,7 @@ static void class_dev_create(struct pvr2_sysfs *sfp)
 	if (ret) {
 		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 			   "device_register failed");
+		put_device(class_dev->parent);
 		put_device(class_dev);
 		return;
 	}
-- 
2.34.1