From: H Hartley Sweeten <hartleys@visionengravers.com>
Date: Fri, 25 Jan 2013 22:02:06 +0000 (-0700)
Subject: staging: comedi: quatech_daqp_cs: fix possible memory dereference issue
X-Git-Tag: v3.9-rc1~127^2~265
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c65c64d0f0b269b1239fdce253fd4717281cc98d;p=pandora-kernel.git

staging: comedi: quatech_daqp_cs: fix possible memory dereference issue

In daqp_attach(), the first options value passed in the comedi_devconfig
is used as an index to the private dev_table[] in this driver. This table
is used to pass the pcmcia_device to the comedi_driver.

Fix the code so that the index is checked before the table is accessed
so that we don't get a possible memory dereference BUG.

Change the error returned to the comedi core from -EIO to -ENODEV.

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