diff options
| author | Ross Lagerwall <ross.lagerwall@citrix.com> | 2018-01-09 12:10:21 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-03 10:23:28 +0100 |
| commit | beaa7d1cea2debe0882c51639d463d3eb987804a (patch) | |
| tree | d501b300541924d469f2b1b88314a80e874f9ea8 /drivers/xen | |
| parent | 1bb81106a113b202e843ffb7d572033eb36cfe01 (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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/xen')
| -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 79b8ab4c6663..54c4c4183fbe 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); |