From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Thu, 30 Oct 2014 18:32:28 +0000 (-0700)
Subject: staging: comedi: rtd520: fix ai_read_n() async->cur_chan use
X-Git-Tag: omap-for-v3.19/fixes-rc1~73^2~465
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c8c1c0ad8edce6c0d0a7d78b5ab6cb2ee4722f1;p=pandora-kernel.git

staging: comedi: rtd520: fix ai_read_n() async->cur_chan use

This functions uses the async->cur_chan to determine if the current channel
is using a bipolar range and the sample needs to be munged. The cur_chan is
never incremented so all the samples are munged based on the fist channel
in the cmd->chanlist.

Bump the cur_chan after writing each sample. This fixes the code so that
the munging will be done correctly.

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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