From 885166c03c1d0ea6d79d707229340e3161ed1316 Mon Sep 17 00:00:00 2001
From: "Russ W. Knize" <russ@knizefamily.net>
Date: Tue, 24 Sep 2013 09:35:40 -0500
Subject: [PATCH] f2fs: don't let the orphan inode counter underflow

Accounting errors from buggy code calling the acquire/release/remove
orphan inode interfaces can cause n_orphans to underflow, which will
then cause acquire_orphan_inode() to return -ENOSPC on the next
operation.  This commit guards against that condition.

Signed-off-by: Russ Knize <rknize@motorola.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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