ext4: Fix ext4_mb_init_cache return error

From: Mingming Cao <cmm@us.ibm.com>

ext4_mb_init_cache() incorrectly always return EIO on success. This
causes the caller of ext4_mb_init_cache() fail when it checks the return
value.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
 fs/ext4/mballoc.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6.26-rc9/fs/ext4/mballoc.c
===================================================================
--- linux-2.6.26-rc9.orig/fs/ext4/mballoc.c	2008-07-11 16:04:57.000000000 -0700
+++ linux-2.6.26-rc9/fs/ext4/mballoc.c	2008-07-11 16:04:58.000000000 -0700
@@ -809,6 +809,7 @@ static int ext4_mb_init_cache(struct pag
 		if (!buffer_uptodate(bh[i]))
 			goto out;
 
+	err = 0;
 	first_block = page->index * blocks_per_page;
 	for (i = 0; i < blocks_per_page; i++) {
 		int group;