Simplifies the code and is more conventional to what's used in the rest
of the kernel for debugfs ops.
Signed-off-by: NTuomas Tynkkynen <tuomas@tuxera.com>
Reviewed-by: NAmit Shah <amit@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>