jbd: do not try lock_acquire after handle made invalid

This likely fixes the oops in __lock_acquire reported as:

http://www.kerneloops.org/raw.php?rawid=2753&msgid=
http://www.kerneloops.org/raw.php?rawid=2749&msgid=

In these reported oopses, start_this_handle is returning -EROFS.

Signed-off-by: Jonas Bonn <jonas.bonn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index 08ff6c7..038ed74 100644 (file)
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -288,10 +288,12 @@ handle_t *journal_start(journal_t *journal, int nblocks)
                jbd_free_handle(handle);
                current->journal_info = NULL;
                handle = ERR_PTR(err);
+               goto out;
        }
 
        lock_acquire(&handle->h_lockdep_map, 0, 0, 0, 2, _THIS_IP_);
 
+out:
        return handle;
 }