[PATCH] f2fs: check the search bound earlier in dir.c/room_for_filename

[Wang Sheng-Hui <shhuiw@gmail.com>]

Check the bound earlier than computing the next search start pos.

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
---
  fs/f2fs/dir.c |    8 ++++++--
  1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 9d1cd42..83a3549 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -406,13 +406,17 @@ next:
  	zero_end = find_next_bit_le(&dentry_blk->dentry_bitmap,
  						NR_DENTRY_IN_BLOCK,
  						zero_start);
+	if (zero_end >= NR_DENTRY_IN_BLOCK)
+		zero_end = NR_DENTRY_IN_BLOCK;	
+
  	if (zero_end - zero_start >= slots)
  		return zero_start;

+	if (zero_end >= NR_DENTRY_IN_BLOCK)
+		return NR_DENTRY_IN_BLOCK;
+
  	bit_start = zero_end + 1;

-	if (zero_end + 1 >= NR_DENTRY_IN_BLOCK)
-		return NR_DENTRY_IN_BLOCK;
  	goto next;
  }

-- 
1.7.10.4