From ed7a693f1391c053a355e7210c238bcb4fb7a332 Mon Sep 17 00:00:00 2001
From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Thu, 5 Dec 2013 13:43:25 -0700
Subject: [PATCH] staging: comedi: das1800: tidy up irq request

This driver only needs an irq in order to support async commands.
If the irq is not available the driver will still function for
single analog input reads.

Tidy up the code that does the irq requests so that the driver
will still attach if it is not avaliable.

Remove the noise about the irq during the attach.

Only hook up the async commands support if the irq is available.
Remove the then unnecessary sanity check in das1800_ai_do_cmd().

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>
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