UBIFS: dump stack in LPT check functions

It is useful to know how we got to the checking function when
hunting the bugs.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index 7bbf03518c7f..c5c07f9cd22c 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -320,6 +320,7 @@ no_space:
         dbg_err("LPT out of space at LEB %d:%d needing %d, done_ltab %d, "
                 "done_lsave %d", lnum, offs, len, done_ltab, done_lsave);
         dbg_dump_lpt_info(c);
+        dump_stack();
         return err;
 }
 
@@ -548,6 +549,7 @@ no_space:
         dbg_err("LPT out of space mismatch at LEB %d:%d needing %d, done_ltab "
                 "%d, done_lsave %d", lnum, offs, len, done_ltab, done_lsave);
         dbg_dump_lpt_info(c);
+        dump_stack();
         return err;
 }
 
@@ -1722,6 +1724,7 @@ int dbg_chk_lpt_free_spc(struct ubifs_info *c)
                 dbg_err("LPT space error: free %lld lpt_sz %lld",
                         free, c->lpt_sz);
                 dbg_dump_lpt_info(c);
+                dump_stack();
                 return -EINVAL;
         }
         return 0;
@@ -1803,8 +1806,10 @@ int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len)
                                 d->chk_lpt_sz, d->chk_lpt_wastage, lpt_sz);
                         err = -EINVAL;
                 }
-                if (err)
+                if (err) {
                         dbg_dump_lpt_info(c);
+                        dump_stack();
+                }
                 d->chk_lpt_sz2 = d->chk_lpt_sz;
                 d->chk_lpt_sz = 0;
                 d->chk_lpt_wastage = 0;