From: H Hartley Sweeten <hartleys@visionengravers.com>
Date: Wed, 19 Sep 2012 22:08:35 +0000 (-0700)
Subject: staging: comedi: s526: don't dereference insn->data pointer
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~75^2~81
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2abd982c484ba0e46ea681b0bc6d7baf7c47730;p=pandora-kernel.git

staging: comedi: s526: don't dereference insn->data pointer

The comedi_insn 'data' pointer is a __user pointer that is
passed into the kernel using an ioctl. The comedi core copies
this data to kernel space in do_insnlist_ioctl() and then
passes that kernel data to the drivers as a separate parameter.
The drivers never need to access the data through the insn->data
pointer.

This fixes a number of sparse warnings about:

  warning: dereference of noderef expression

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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