Help. INFO: possible circular locking dependency detected

During suspend-to-RAM, I see an info message below. Could anybody advice how to debug this problem or anyone has experienced this before? (ARM mach) Thanks a lot for any help. [ 172.637547] == [ 172.637555] [ INFO: possible circular

Help. INFO: possible circular locking dependency detected

During suspend-to-RAM, I see an info message below. Could anybody advice how to debug this problem or anyone has experienced this before? (ARM mach) Thanks a lot for any help. [ 172.637547] == [ 172.637555] [ INFO: possible circular