gfs2: Fix loop in gfs2_rbm_find

Fix the resource group wrap-around logic in gfs2_rbm_find that commit
e579ed4f44 broke.  The bug can lead to unnecessary repeated scanning of the
same bitmaps; there is a risk that future changes will turn this into an
endless loop.

Fixes: e579ed4f44 ("GFS2: Introduce rbm field bii")
Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index b08a530433ad..8d7916570362 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1780,9 +1780,9 @@ static int gfs2_rbm_find(struct gfs2_rbm *rbm, u8 state, u32 *minext,
                         goto next_iter;
                 }
                 if (ret == -E2BIG) {
+                        n += rbm->bii - initial_bii;
                         rbm->bii = 0;
                         rbm->offset = 0;
-                        n += (rbm->bii - initial_bii);
                         goto res_covered_end_of_rgrp;
                 }
                 return ret;