From: Tejun Heo <htejun@gmail.com>
Date: Tue, 27 Nov 2007 08:30:39 +0000 (+0100)
Subject: scatterlist: add more safeguards
X-Git-Tag: v2.6.24-rc4~87^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=645a8d94629fd812a220d54876339a1ddafd9bc2;p=pandora-kernel.git

scatterlist: add more safeguards

Add more safeguards to protect against misinterpreting a chain entry
as a normal scatterlist and vice-versa.

* Make sure the entry isn't a chain when assigning and reading a
  normal sg.

* Clear offset and length when chaining.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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