Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/ext4/inode.c |    5 +++++
 1 file changed, 5 insertions(+)

diff -puN fs/ext4/inode.c~ext4-mm-delalloc-ext4-release-page-when-write_begin-failed fs/ext4/inode.c
--- a/fs/ext4/inode.c~ext4-mm-delalloc-ext4-release-page-when-write_begin-failed
+++ a/fs/ext4/inode.c
@@ -1522,6 +1522,11 @@ static int ext4_da_write_begin(struct fi
 
 	ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
 							ext4_da_get_block_prep);
+	if (ret < 0) {
+		unlock_page(page);
+		page_cache_release(page);
+	}
+		
 	return ret;
 }
 
_