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Subject[PATCH] ocfs2: fix module_init error handling
From: Akinobu Mita <akinobu.mita@gmail.com>
Subject: [PATCH] ocfs2: fix module_init error handling

Fix error handling in module_init and make module_init() return
correct error code.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: Kurt Hackel <kurt.hackel@oracle.com>
---
fs/ocfs2/super.c | 42 +++++++++++++++++++++++++++---------------
1 file changed, 27 insertions(+), 15 deletions(-)

Index: 2.6-mm/fs/ocfs2/super.c
===================================================================
--- 2.6-mm.orig/fs/ocfs2/super.c
+++ 2.6-mm/fs/ocfs2/super.c
@@ -806,46 +806,58 @@ static int __init ocfs2_init(void)

ocfs2_print_version();

- if (init_ocfs2_extent_maps())
- return -ENOMEM;
+ status = init_ocfs2_extent_maps();
+ if (status)
+ goto err_extent_maps;

status = init_ocfs2_uptodate_cache();
if (status < 0) {
mlog_errno(status);
- goto leave;
+ goto err_uptodate_cache;
}

status = ocfs2_initialize_mem_caches();
if (status < 0) {
mlog_errno(status);
- goto leave;
+ goto err_mem_caches;
}

ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
if (!ocfs2_wq) {
status = -ENOMEM;
- goto leave;
+ goto err_workqueue;
}

ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
if (!ocfs2_debugfs_root) {
status = -EFAULT;
mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
+ goto err_debugfs;
}

-leave:
- if (status < 0) {
- ocfs2_free_mem_caches();
- exit_ocfs2_uptodate_cache();
- exit_ocfs2_extent_maps();
- }
+ status = register_filesystem(&ocfs2_fs_type);
+ if (status)
+ goto err_filesystem;

mlog_exit(status);

- if (status >= 0) {
- return register_filesystem(&ocfs2_fs_type);
- } else
- return -1;
+ return 0;
+
+err_filesystem:
+ debugfs_remove(ocfs2_debugfs_root);
+err_debugfs:
+ flush_workqueue(ocfs2_wq);
+ destroy_workqueue(ocfs2_wq);
+err_workqueue:
+ ocfs2_free_mem_caches();
+err_mem_caches:
+ exit_ocfs2_uptodate_cache();
+err_uptodate_cache:
+ exit_ocfs2_extent_maps();
+err_extent_maps:
+ mlog_exit(status);
+
+ return status;
}

static void __exit ocfs2_exit(void)
-
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