ext4: allow ext4_truncate() to return an error

This allows us to properly propagate errors back up to
ext4_truncate()'s callers.  This also means we no longer have to
silently ignore some errors (e.g., when trying to add the inode to the
orphan inode list).

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 20da99d..e4f61c3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2330,7 +2330,7 @@ static void ext4_orphan_cleanup(struct super_block *sb,
 				struct ext4_super_block *es)
 {
 	unsigned int s_flags = sb->s_flags;
-	int nr_orphans = 0, nr_truncates = 0;
+	int ret, nr_orphans = 0, nr_truncates = 0;
 #ifdef CONFIG_QUOTA
 	int i;
 #endif
@@ -2412,7 +2412,9 @@ static void ext4_orphan_cleanup(struct super_block *sb,
 				  inode->i_ino, inode->i_size);
 			inode_lock(inode);
 			truncate_inode_pages(inode->i_mapping, inode->i_size);
-			ext4_truncate(inode);
+			ret = ext4_truncate(inode);
+			if (ret)
+				ext4_std_error(inode->i_sb, ret);
 			inode_unlock(inode);
 			nr_truncates++;
 		} else {