ocfs2: cleanup return value and mlog in ocfs2_global_read_info()

Return 0 instead of sizeof(ocfs2_global_disk_dqinfo) that .quota_read
returns in normal case.  Also cleanup mlog to make code more readable.

Link: https://lkml.kernel.org/r/20240904071004.2067695-2-joseph.qi@linux.alibaba.com
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Heming Zhao <heming.zhao@suse.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: josephhz

fs/ocfs2/quota_global.c

@@ -371,12 +371,16 @@ int ocfs2_global_read_info(struct super_block *sb, int type)
 
 	status = ocfs2_extent_map_get_blocks(oinfo->dqi_gqinode, 0, &oinfo->dqi_giblk,
 					     &pcount, NULL);
-	if (status < 0)
+	if (status < 0) {
+		mlog_errno(status);
 		goto out_unlock;
+	}
 
 	status = ocfs2_qinfo_lock(oinfo, 0);
-	if (status < 0)
+	if (status < 0) {
+		mlog_errno(status);
 		goto out_unlock;
+	}
 	status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
 				      sizeof(struct ocfs2_global_disk_dqinfo),
 				      OCFS2_GLOBAL_INFO_OFF);
@@ -404,12 +408,11 @@ int ocfs2_global_read_info(struct super_block *sb, int type)
 	schedule_delayed_work(&oinfo->dqi_sync_work,
 			      msecs_to_jiffies(oinfo->dqi_syncms));
 
-out_err:
-	return status;
+	return 0;
 out_unlock:
 	ocfs2_unlock_global_qf(oinfo, 0);
-	mlog_errno(status);
-	goto out_err;
+out_err:
+	return status;
 }
 
 /* Write information to global quota file. Expects exclusive lock on quota