From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 4 Nov 2011 18:24:36 +0000 (+0300)
Subject: xen-gntalloc: signedness bug in add_grefs()
X-Git-Tag: v3.2-rc3~38^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99cb2ddcc617f43917e94a4147aa3ccdb2bcd77e;p=pandora-kernel.git

xen-gntalloc: signedness bug in add_grefs()

gref->gref_id is unsigned so the error handling didn't work.
gnttab_grant_foreign_access() returns an int type, so we can add a
cast here, and it doesn't cause any problems.
gnttab_grant_foreign_access() can return a variety of errors
including -ENOSPC, -ENOSYS and -ENOMEM.

CC: stable@kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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