From: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Date: Thu, 27 May 2010 09:58:03 +0000 (+0900)
Subject: vhost: fix to check the return value of copy_to/from_user() correctly
X-Git-Tag: v2.6.35-rc1~24^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7ad9c9d27048547e96e4e3a13b5780ec6f81bb9f;p=pandora-kernel.git

vhost: fix to check the return value of copy_to/from_user() correctly

copy_to/from_user() returns the number of bytes that could not be copied.

So we need to check if it is not zero, and in that case, we should return
the error number -EFAULT rather than directly return the return value from
copy_to/from_user().

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

Reading git-diff-tree failed