diff options
| author | Ross Lagerwall <ross.lagerwall@citrix.com> | 2018-01-09 12:10:21 +0000 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@microsoft.com> | 2018-03-20 23:49:46 -0400 |
| commit | a3adc9d838d65c596b4479af572c8b1619d01d9f (patch) | |
| tree | be191828a1e8a85875f098a795ac59a4e9e94d5d /drivers | |
| parent | 20d94194c82f726f7054d233d4a166e6bf323823 (diff) | |
xen/gntdev: Fix off-by-one error when unmapping with holes
[ Upstream commit 951a010233625b77cde3430b4b8785a9a22968d1 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/xen/gntdev.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index cea37ee4c615..fc94f0ec6f29 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -378,10 +378,8 @@ 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); |