From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Wed, 5 Aug 2015 17:44:42 +0000 (-0700)
Subject: staging: comedi: me4000: remove 'board' from me4000_ai_insn_read()
X-Git-Tag: omap-for-v4.3/fixes-merge-window~44^2~230
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a02387063fbd32f51c98540499b90acc8b4317f;p=pandora-kernel.git

staging: comedi: me4000: remove 'board' from me4000_ai_insn_read()

The 'board' pointer is only used in this function to verify that the
'chan' is valid for an aref of AREF_DIFF. For differential inputs, the
maximum channel is half the subdevice 'n_chan'. Use that instead and
remove the 'board' variable.

Also, the comedi core does not validate the aref flags. Add a check
to ensure that the subdevice actually supports the AREF_DIFF mode.

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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