[PATCH] xfs: fix the extent count when allocating an new indirection array entry

[Jeff Liu]

From: Jie Liu <jeff.liu at oracle.com>

At xfs_iext_add(), if extent(s) are being appended to the last
page in the indirection array and the new extent(s) don't fit
in the page, the number of extents(erp->er_extcount) in a new
allocated entry should be the minimum value between count and
XFS_LINEAR_EXTS, instead of count.

Signed-off-by: Jie Liu <jeff.liu at oracle.com>
---
 fs/xfs/xfs_inode_fork.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_inode_fork.c b/fs/xfs/xfs_inode_fork.c
index 02f1083..dfb4226 100644
--- a/fs/xfs/xfs_inode_fork.c
+++ b/fs/xfs/xfs_inode_fork.c
@@ -1035,11 +1035,11 @@ xfs_iext_add(
 
 			while (count) {
 				erp = xfs_iext_irec_new(ifp, erp_idx);
-				erp->er_extcount = count;
-				count -= MIN(count, (int)XFS_LINEAR_EXTS);
-				if (count) {
+				erp->er_extcount = MIN(count,
+						       (int)XFS_LINEAR_EXTS);
+				count -= erp->er_extcount;
+				if (count)
 					erp_idx++;
-				}
 			}
 		}
 	}
-- 
1.7.9.5