staging: comedi: kcomedilib_main: (!foo) preferred over (foo == NULL)

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2015-03-04 12:15:41 -07:00 committed by Greg Kroah-Hartman
parent c6be154812
commit 4c36fdde64

View file

@ -58,7 +58,7 @@ struct comedi_device *comedi_open(const char *filename)
retval = NULL;
up_read(&dev->attach_lock);
if (retval == NULL)
if (!retval)
comedi_dev_put(dev);
return retval;