diff --git a/0215-net-hns3-fix-inaccurate-RTC-time-to-read.patch b/0215-net-hns3-fix-inaccurate-RTC-time-to-read.patch
new file mode 100644
index 0000000..59a0c08
--- /dev/null
+++ b/0215-net-hns3-fix-inaccurate-RTC-time-to-read.patch
@@ -0,0 +1,53 @@
+From 3cd01cd12d4987b76be0ff1b25bc21a558aab6f1 Mon Sep 17 00:00:00 2001
+From: Huisong Li <lihuisong@huawei.com>
+Date: Mon, 9 Jan 2023 16:23:44 +0800
+Subject: net/hns3: fix inaccurate RTC time to read
+
+[ upstream commit 4243282181f38d387188af5fd38a5428864a94a2 ]
+
+The sequence of reading current RTC time register doesn't meet
+the hardware requirements, which causes this time obtained is
+the one before modifying RTC time.
+
+Fixes: 38b539d96eb6 ("net/hns3: support IEEE 1588 PTP")
+Cc: stable@dpdk.org
+
+Signed-off-by: Huisong Li <lihuisong@huawei.com>
+Acked-by: Dongdong Liu <liudongdong3@huawei.com>
+---
+ drivers/net/hns3/hns3_ptp.c | 12 ++++++++----
+ 1 file changed, 8 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/net/hns3/hns3_ptp.c b/drivers/net/hns3/hns3_ptp.c
+index 6bbd85ba23..db3c007b12 100644
+--- a/drivers/net/hns3/hns3_ptp.c
++++ b/drivers/net/hns3/hns3_ptp.c
+@@ -216,17 +216,21 @@ hns3_timesync_read_tx_timestamp(struct rte_eth_dev *dev,
+ int
+ hns3_timesync_read_time(struct rte_eth_dev *dev, struct timespec *ts)
+ {
++#define HNS3_PTP_SEC_H_OFFSET	32
++#define HNS3_PTP_SEC_H_MASK	0xFFFF
++
+ 	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
++	uint32_t sec_hi, sec_lo;
+ 	uint64_t ns, sec;
+ 
+ 	if (!hns3_dev_get_support(hw, PTP))
+ 		return -ENOTSUP;
+ 
+-	sec = hns3_read_dev(hw, HNS3_CURR_TIME_OUT_L);
+-	sec |= (uint64_t)(hns3_read_dev(hw, HNS3_CURR_TIME_OUT_H) & 0xFFFF)
+-		<< 32;
+-
+ 	ns = hns3_read_dev(hw, HNS3_CURR_TIME_OUT_NS);
++	sec_hi = hns3_read_dev(hw, HNS3_CURR_TIME_OUT_H) & HNS3_PTP_SEC_H_MASK;
++	sec_lo = hns3_read_dev(hw, HNS3_CURR_TIME_OUT_L);
++	sec = ((uint64_t)sec_hi << HNS3_PTP_SEC_H_OFFSET) | sec_lo;
++
+ 	ns += sec * NSEC_PER_SEC;
+ 	*ts = rte_ns_to_timespec(ns);
+ 
+-- 
+2.23.0
+
diff --git a/dpdk.spec b/dpdk.spec
index 680edf8..9a81418 100644
--- a/dpdk.spec
+++ b/dpdk.spec
@@ -1,6 +1,6 @@
 Name: dpdk
 Version: 21.11
-Release: 27
+Release: 28
 Packager: packaging@6wind.com
 URL: http://dpdk.org
 %global source_version  21.11
@@ -232,6 +232,7 @@ Patch9211:    0211-app-procinfo-dump-module-EEPROM-info.patch
 Patch9212:    0212-app-procinfo-add-burst-mode-to-Rx-Tx-queue-info.patch
 Patch9213:    0213-app-procinfo-dump-detailed-info-for-Rx-Tx-descriptor.patch
 Patch9214:    0214-dma-hisilicon-support-vchan-status-query.patch
+Patch9215:	0215-net-hns3-fix-inaccurate-RTC-time-to-read.patch
 
 Summary: Data Plane Development Kit core
 Group: System Environment/Libraries
@@ -374,6 +375,9 @@ strip -g $RPM_BUILD_ROOT/lib/modules/%{kern_devel_ver}/extra/dpdk/igb_uio.ko
 /usr/sbin/depmod
 
 %changelog
+* Tue Jan 31 2023 chenjiji <chenjiji09@163.com> - 21.11-28
+- net/hns3: fix inaccurate RTC time to read
+
 * Wed Dec 14 2022 chenjiji <chenjiji09@163.com> - 21.11-27
 - dma/hisilicon: support vchan status query