[PATCH 8/9] xfs: fix up asserts in xfs_iflush_fork

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

Remove asserts in xfs_iflush_fork that would call xfs_iext_get_ext with
a potentially invalid extent buffer index.

Based on an earlier patch from Lachlan McIlroy.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: xfs/fs/xfs/xfs_inode.c
===================================================================
--- xfs.orig/fs/xfs/xfs_inode.c 2011-05-11 10:18:39.555233397 +0200
+++ xfs/fs/xfs/xfs_inode.c      2011-05-11 12:04:24.099733330 +0200
@@ -2557,12 +2557,9 @@ xfs_iflush_fork(
        case XFS_DINODE_FMT_EXTENTS:
                ASSERT((ifp->if_flags & XFS_IFEXTENTS) ||
                       !(iip->ili_format.ilf_fields & extflag[whichfork]));
-               ASSERT((xfs_iext_get_ext(ifp, 0) != NULL) ||
-                       (ifp->if_bytes == 0));
-               ASSERT((xfs_iext_get_ext(ifp, 0) == NULL) ||
-                       (ifp->if_bytes > 0));
                if ((iip->ili_format.ilf_fields & extflag[whichfork]) &&
                    (ifp->if_bytes > 0)) {
+                       ASSERT(xfs_iext_get_ext(ifp, 0));
                        ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0);
                        (void)xfs_iextents_copy(ip, (xfs_bmbt_rec_t *)cp,
                                whichfork);