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authorRoss Lagerwall <ross.lagerwall@citrix.com>2018-01-09 12:10:21 +0000
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2018-01-10 08:38:17 -0500
commit951a010233625b77cde3430b4b8785a9a22968d1 (patch)
tree727e81424bd99be25ad0d9ac96114a847bb23f1a /drivers/xen
parent66a640e7823da803fdb68d5d88f7a8fbd11c29e6 (diff)
xen/gntdev: Fix off-by-one error when unmapping with holes
If the requested range has a hole, the calculation of the number of pages to unmap is off by one. Fix it. Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/gntdev.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index 57efbd3b053b..d3391a1e3796 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -380,10 +380,8 @@ static int unmap_grant_pages(struct grant_map *map, int offset, int pages)
}
range = 0;
while (range < pages) {
- if (map->unmap_ops[offset+range].handle == -1) {
- range--;
+ if (map->unmap_ops[offset+range].handle == -1)
break;
- }
range++;
}
err = __unmap_grant_pages(map, offset, range);

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