From b9aaea39f65e242303103b5283abeaefd8e538a4 Mon Sep 17 00:00:00 2001
From: Chase Southwood <chase.southwood@gmail.com>
Date: Thu, 31 Jul 2014 20:56:47 -0500
Subject: [PATCH] staging: comedi: addi_apci_1564: remove diagnostic interrupt
 support code

As per Ian, at this point in time it is not worth implementing an async
command interface for diagnostic interrupts for this board.  As this is
the case, this patch removes the code which supports such interrupts as it
is now unused.

This includes removing apci1564_do_read(), which was the insn_read
operation for the digital output subdevice, since all it was doing was
reading the current diagnostic interrupt type and returning it in 'data'.
This doesn't follow the comedi API and this operation can be emulated by
the comedi core anyway since the insn_bits operation follows the comedi
API.  So it is safe to simply remove this function.

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