nilfs2: replace BUG_ON and BUG calls triggerable from ioctl

Pekka Enberg advised me:
> It would be nice if BUG(), BUG_ON(), and panic() calls would be
> converted to proper error handling using WARN_ON() calls. The BUG()
> call in nilfs_cpfile_delete_checkpoints(), for example, looks to be
> triggerable from user-space via the ioctl() system call.

This will follow the comment and keep them to a minimum.

Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index e0a632b86feb..47dd815433fd 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -154,10 +154,8 @@ nilfs_mdt_submit_block(struct inode *inode, unsigned long blkoff,
                         ret = -EBUSY;
                         goto failed_bh;
                 }
-        } else {
-                BUG_ON(mode != READ);
+        } else /* mode == READ */
                 lock_buffer(bh);
-        }
 
         if (buffer_uptodate(bh)) {
                 unlock_buffer(bh);