From 0fdf96b67ac2649cc1ddb29b316a0db11586c6a8 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Fri, 3 Apr 2009 09:12:20 +0900
Subject: [PATCH] [SCSI] sg: fix iovec bugs introduced by the block layer
 conversion

- needs to use copy_from_user for iovec before passing it to
blk_rq_map_user_iov().

- before the block layer conversion, if ->dxfer_len and sum of iovec
disagrees, the shorter one wins. However, currently sg returns
-EINVAL. This restores the old behavior.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
---
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