From: Dan Carpenter <error27@gmail.com>
Date: Sat, 19 Mar 2011 05:44:34 +0000 (+0300)
Subject: xen-gntdev: return -EFAULT on copy_to_user failure
X-Git-Tag: v2.6.39-rc1~3^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12f0258d5b44b3b5a9442ec461bbac1f7edab8c6;p=pandora-kernel.git

xen-gntdev: return -EFAULT on copy_to_user failure

copy_to_user() returns the amount of data remaining to be copied.  We
want to return a negative error code here.  The upper layers just
call WARN_ON() if we return non-zero so this doesn't change the
behavior.  But returning -EFAULT is still cleaner.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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