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xen/gntalloc: release grant references on page free 

gnttab_end_foreign_access_ref does not return the grant reference it is
passed to the free list; gnttab_free_grant_reference needs to be
explicitly called. While gnttab_end_foreign_access provides a wrapper
for this, it is unsuitable because it does not return errors.

Reported-by: Anil Madhavapeddy <anil@recoil.org>
Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Daniel De Graaf 2011-11-28 11:49:10 -05:00 committed by Konrad Rzeszutek Wilk
parent c3b3f16d1b
commit 0105d2b4fb
1 changed files with 2 additions and 0 deletions
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2
drivers/xen/gntalloc.c
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@ -191,6 +191,8 @@ static void __del_gref(struct gntalloc_gref *gref)
if (!gnttab_end_foreign_access_ref(gref->gref_id, 0))
return;
gnttab_free_grant_reference(gref->gref_id);
}
gref_size--;