tree 2c2f3a0271dc0e2b627eb45823c03a10bbce3002
parent 21643e69a4c06f7ef155fbc70e3fba13fba4a756
author Dan Carpenter <dan.carpenter@oracle.com> 1320431076 +0300
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1321463628 -0500

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>