UBIFS: do not read flash unnecessarily

commit 8b229c76765816796eec7ccd428f03bd8de8b525 upstream.

This fix makes the 'dbg_check_old_index()' function return
immediately if debugging is disabled, instead of executing
incorrect 'goto out' which causes UBIFS to:

1. Allocate memory
2. Read the flash

On every commit. OK, we do not commit that often, but it is
still silly to do unneeded I/O anyway.

Credits to coverity for spotting this silly issue.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index 0a6aa2cc78f07eb7e0aa4ce6af2dfe8b5fe32ca5..bcb2d298c2e99eceed4a3e22876e6e4d04995791 100644 (file)
--- a/fs/ubifs/commit.c
+++ b/fs/ubifs/commit.c
@@ -517,7 +517,7 @@ int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot)
        size_t sz;
 
        if (!(ubifs_chk_flags & UBIFS_CHK_OLD_IDX))
-               goto out;
+               return 0;
 
        INIT_LIST_HEAD(&list);