1 files changed, 3 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index ff145fd0d1a4..aa9daaea6c34 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -683,6 +683,9 @@ xfs_write(
                         (xip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
                                 mp->m_rtdev_targp : mp->m_ddev_targp;
 
+                if (ioflags & IO_ISAIO)
+                        return XFS_ERROR(-ENOSYS);
+
                 if ((pos & target->pbr_smask) || (count & target->pbr_smask))
                         return XFS_ERROR(-EINVAL);