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staging: comedi: rtd520: allow attaching without interrupt support
authorH Hartley Sweeten <hartleys@visionengravers.com>
Mon, 29 Oct 2012 17:06:03 +0000 (10:06 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 30 Oct 2012 17:44:39 +0000 (10:44 -0700)
Interrupts ares only required for the ai subdevice command support.

Allow the driver to attach to the board even if request_irq() fails.
Only hook up the command support if the interrupt is available.

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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