staging: comedi: ni_atmio16d: tidy up the irq support in atmio16d_attach()
Tidy up the code that does the request_irq(). Only hookup the commad support if the irq was sucessfully requested. Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: NIan Abbott <abbotti@mev.co.uk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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