[PATCH v2] net/axgbe: fix the build warning for GCC-16

[Sebastian, Selwin]

[AMD Official Use Only - AMD Internal Distribution Only]

Acked-by: Selwin Sebastian<selwin.sebastian at amd.com>

-----Original Message-----
From: Ande, Venkat Kumar <VenkatKumar.Ande at amd.com>
Sent: Thursday, November 13, 2025 10:11 PM
To: dev at dpdk.org
Cc: Sebastian, Selwin <Selwin.Sebastian at amd.com>; Ande, Venkat Kumar <VenkatKumar.Ande at amd.com>; stable at dpdk.org
Subject: [PATCH v2] net/axgbe: fix the build warning for GCC-16

Build warning reported for local variable set and not used on GCC-16.
Fix the issue by using the variable for missed register write operation.

../drivers/net/axgbe/axgbe_ethdev.c: In function ‘axgbe_timesync_disable’:
../drivers/net/axgbe/axgbe_ethdev.c:1744:22: warning:
variable ‘mac_tscr’ set but not used [-Wunused-but-set-variable=]
 1744 |         unsigned int mac_tscr = 0;
      |                      ^~~~~~~~

Bugzilla ID: 1819
Fixes: e04449488fdb ("net/axgbe: support IEEE 1588 PTP")
Cc: stable at dpdk.org

Signed-off-by: Venkat Kumar Ande <VenkatKumar.Ande at amd.com>
---
 drivers/net/axgbe/axgbe_ethdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/axgbe/axgbe_ethdev.c b/drivers/net/axgbe/axgbe_ethdev.c
index 31d35ff182..cf3b0d9ef5 100644
--- a/drivers/net/axgbe/axgbe_ethdev.c
+++ b/drivers/net/axgbe/axgbe_ethdev.c
@@ -1742,6 +1742,7 @@ axgbe_timesync_disable(struct rte_eth_dev *dev)  {
        struct axgbe_port *pdata = dev->data->dev_private;
        unsigned int mac_tscr = 0;
+       unsigned int value = 0;

        /*disable timestamp for all pkts*/
        AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 0); @@ -1751,6 +1752,11 @@ axgbe_timesync_disable(struct rte_eth_dev *dev)
        AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCFUPDT, 0);
        /*disable time stamp*/
        AXGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 0);
+
+       value = AXGMAC_IOREAD(pdata, MAC_TSCR);
+       value |= mac_tscr;
+       AXGMAC_IOWRITE(pdata, MAC_TSCR, value);
+
        return 0;
 }

--
2.40.1.windows.1