From 9270b00ffa271529921e9456bb77a40003c147fd Mon Sep 17 00:00:00 2001
From: zlxzfg <1528343280@qq.com>
Date: Mon, 27 May 2024 17:28:16 +0800
Subject: [PATCH] tcmur_cmd_handler: To fix the issue on a CentOS 7.9 client
 where the tcmu-runner ver=1.5.4 service faild after using mkfs.xfs to format
 a LUN device

---
 tcmur_cmd_handler.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tcmur_cmd_handler.c b/tcmur_cmd_handler.c
index 01d6a109..dfde92ef 100644
--- a/tcmur_cmd_handler.c
+++ b/tcmur_cmd_handler.c
@@ -685,7 +685,7 @@ static int handle_unmap_in_writesame(struct tcmu_device *dev,
 	int ret;
 
 	/* If not aligned then falls back to the writesame without unmap */
-	if (lba % align || nlbas % align) {
+	if (align == 0 || lba % align || nlbas % align) {
 		tcmu_dev_dbg(dev,
 			     "Start lba: %"PRIu64" or nlbas: %"PRIu64" not aligned to %"PRIu32"\n",
 			     lba, nlbas, align);