From: Andrew Morton <akpm@osdl.org>

Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/input/input.c |    4 ++++
 1 file changed, 4 insertions(+)

diff -puN drivers/input/input.c~input_register_device-debug drivers/input/input.c
--- a/drivers/input/input.c~input_register_device-debug
+++ a/drivers/input/input.c
@@ -1007,6 +1007,10 @@ int input_register_device(struct input_d
  fail3:	sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
  fail2:	sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
  fail1:	class_device_del(&dev->cdev);
+	if (error) {
+		printk(KERN_ERR "%s failed: %d\n", __FUNCTION__, error);
+		dump_stack();
+	}
 	return error;
 }
 EXPORT_SYMBOL(input_register_device);
_