[PATCH] dm-ioctl: Return data to userspace after rename ioctl is processed

[Peter Rajnoha <prajnoha@redhat.com>]

Allow data to be returned to userspace after a rename ioctl is processed.
It carries important information for userspace code to react properly,
now checking new DM_UEVENT_GENERATED_FLAG that has been added recently.

Signed-off-by: Peter Rajnoha
---

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index d7500e1..d33f171 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -774,8 +774,6 @@ static int dev_rename(struct dm_ioctl *param, size_t param_size)
 	if (r)
 		return r;
 
-	param->data_size = 0;
-
 	return dm_hash_rename(param->event_nr, &param->flags, param->name,
 			      new_name);
 }