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 <[email protected]> Signed-off-by: Daniel De Graaf <[email protected]> Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
goeke · Dec 16, 2011 · 0105d2b · 0105d2b
1 parent c3b3f16
commit 0105d2b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c
@@ -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--;