[PATCH] ubifs: fix read fail but return ok

[wangfangpeng]

do_readpage() may return err, but ubifs_readpage() always return ok.
The vfs will ignore the err happen in ubifs.

Fixes: 1e51764a3c2ac05a2 ("UBIFS: add new flash file system")
Cc: <stable at vger.kernel.org> #v2.6.27
Signed-off-by: wangfangpeng <wangfangpeng1 at huawei.com>
---
 fs/ubifs/file.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 0e4b4be3aa26..001feec1d415 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -892,11 +892,13 @@ static int ubifs_bulk_read(struct page *page)
 
 static int ubifs_readpage(struct file *file, struct page *page)
 {
+	int ret;
+
 	if (ubifs_bulk_read(page))
 		return 0;
-	do_readpage(page);
+	ret = do_readpage(page);
 	unlock_page(page);
-	return 0;
+	return ret;
 }
 
 static int do_writepage(struct page *page, int len)
-- 
2.12.3