From 05d4c6f6289fdd9df7fd875ddf361af876419796 Mon Sep 17 00:00:00 2001
From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Thu, 23 May 2013 12:40:45 -0700
Subject: [PATCH] staging: comedi: usbduxsigma: change return type of the stop
 functions

The usbdux_pwm_cancel() function is the only caller that does not validate
the comedi_device private data before calling the stop function. Move the
validation test to that function and remove the unnecessary sanity checks.

Since the stop functions always succeed, change the return type to void.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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