If cb_arg alloc failed, we can't release the struct orig_io_req refcount
before we take its refcount. As Saurav said, move the rec_err label down
to avoid unnecessary refcount release and nullptr free.
Signed-off-by: Lin Yi <teroincn@163.com>
Acked-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>