f2fs: return i_size if the hole is outside of i_size

When SEEK_HOLE is requeted, it should return i_size if the hole position is
found outside of i_size.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d99d173..3112857 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -255,9 +255,9 @@
 
 	if (whence == SEEK_DATA)
 		goto fail;
-	else
-		data_ofs = isize;
 found:
+	if (whence == SEEK_HOLE && data_ofs > isize)
+		data_ofs = isize;
 	mutex_unlock(&inode->i_mutex);
 	return vfs_setpos(file, data_ofs, maxbytes);
 fail: