[Xen-changelog] [linux-2.6.18-xen] xen-blkfront: beyond ARRAY_SIZE of info->shadow

["Xen patchbot-linux-2.6.18-xen" <patchbot-linux-2.6.18-xen@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1248855700 -3600
# Node ID 56ba8bd8093e716d27a9afb60c3c5e96b2065a75
# Parent  15da3cf243a30c1b7549e723ad392bdc90a88fd0
xen-blkfront: beyond ARRAY_SIZE of info->shadow

Import upstream pv-ops change
b9ed7252d219c1c663944bf03846eabb515dbe75:

Do not go beyond ARRAY_SIZE of info->shadow
Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx>

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
---
 drivers/xen/blkfront/blkfront.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 15da3cf243a3 -r 56ba8bd8093e drivers/xen/blkfront/blkfront.c
--- a/drivers/xen/blkfront/blkfront.c   Tue Jul 28 16:29:11 2009 +0100
+++ b/drivers/xen/blkfront/blkfront.c   Wed Jul 29 09:21:40 2009 +0100
@@ -428,7 +428,7 @@ static inline int GET_ID_FROM_FREELIST(
        struct blkfront_info *info)
 {
        unsigned long free = info->shadow_free;
-       BUG_ON(free > BLK_RING_SIZE);
+       BUG_ON(free >= BLK_RING_SIZE);
        info->shadow_free = info->shadow[free].req.id;
        info->shadow[free].req.id = 0x0fffffee; /* debug */
        return free;

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