Fix usage of device_trylock. It has the same semantics of mutex_trylock, so it
returns 1 if the lock has been acquired successfully.
Signed-off-by: NClaudio Scordino <claudio@evidence.eu.com>
Signed-off-by: NBruno Morelli <bruno@evidence.eu.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>