1 files changed, 5 insertions, 4 deletions

diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index fd4abb8a32c5..1fb757ef3f41 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -1704,9 +1704,9 @@ xfs_qm_get_rtblks(
         xfs_qcnt_t      *O_rtblks)
 {
         xfs_filblks_t   rtblks;                 /* total rt blks */
+        xfs_extnum_t    idx;                    /* extent record index */
         xfs_ifork_t     *ifp;                   /* inode fork pointer */
         xfs_extnum_t    nextents;               /* number of extent entries */
-        xfs_bmbt_rec_t  *base;                  /* base of extent array */
         xfs_bmbt_rec_t  *ep;                    /* pointer to an extent entry */
         int             error;
 
@@ -1717,10 +1717,11 @@ xfs_qm_get_rtblks(
                         return error;
         }
         rtblks = 0;
-        nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
-        base = &ifp->if_u1.if_extents[0];
-        for (ep = base; ep < &base[nextents]; ep++)
+        nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
+        for (idx = 0; idx < nextents; idx++) {
+                ep = xfs_iext_get_ext(ifp, idx);
                 rtblks += xfs_bmbt_get_blockcount(ep);
+        }
         *O_rtblks = (xfs_qcnt_t)rtblks;
         return 0;
 }