[PATCH] ext4 balloc: fix off-by-one against rsv_end

rsv_end is the last block within the reservation, so alloc_new_reservation
should accept start_block == rsv_end as success.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 2bcca5261eeb..c5589b3f58e8 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1165,7 +1165,7 @@ retry:
          * check if the first free block is within the
          * free space we just reserved
          */
-        if (start_block >= my_rsv->rsv_start && start_block < my_rsv->rsv_end)
+        if (start_block >= my_rsv->rsv_start && start_block <= my_rsv->rsv_end)
                 return 0;               /* success */
         /*
          * if the first free bit we found is out of the reservable space