From: Ian Abbott <abbotti@mev.co.uk>
Date: Fri, 31 Oct 2014 14:32:27 +0000 (+0000)
Subject: staging: comedi: icp_multi: correct insn_bits returned data for DO
X-Git-Tag: omap-for-v3.19/fixes-rc1~73^2~463
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf5d2af6839deb2e7765648ce139dc9677db0c18;p=pandora-kernel.git

staging: comedi: icp_multi: correct insn_bits returned data for DO

For some unfathomable reason, the Comedi `insn_bits` handler for the
digital output subdevice (`icp_multi_insn_bits_do()`) writes the digital
output register and reads back the unrelated digital input register.
Read back the current state of the outputs (held in `s->state`) instead.

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