tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 41b7827f33a9fc1fe425b85029312de34b0f0abe commit: a0c5bfdbc099daf30cbadb9657803f0cb3f89d0b [3011/3011] drivers: support for rnpm drivers from Mucse Technology N10/N400 config: arm64-randconfig-004-20250704 (https://download.01.org/0day-ci/archive/20250704/202507041638.fqBxner2-lkp@i...) compiler: aarch64-linux-gcc (GCC) 10.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250704/202507041638.fqBxner2-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202507041638.fqBxner2-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/net/ethernet/mucse/rnpm/rnpm_sysfs.c:263:5: warning: no previous prototype for 'rnpm_mbx_get_pn_sn' [-Wmissing-prototypes] 263 | int rnpm_mbx_get_pn_sn(struct rnpm_hw *hw, char pn[33], char sn[33]) | ^~~~~~~~~~~~~~~~~~ drivers/net/ethernet/mucse/rnpm/rnpm_sysfs.c: In function '_switch_loopback':

...

drivers/net/ethernet/mucse/rnpm/rnpm_sysfs.c:1524:2: warning: 'strncpy' specified bound 100 equals destination size [-Wstringop-truncation] 1524 | strncpy(name, peer_eth, sizeof(name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/strncpy +1524 drivers/net/ethernet/mucse/rnpm/rnpm_sysfs.c 1515 1516 static ssize_t _switch_loopback(struct rnpm_adapter *adapter, 1517 const char *peer_eth, int en) 1518 { 1519 struct net_device *peer_netdev = NULL; 1520 struct rnpm_adapter *peer_adapter = NULL; 1521 int i; 1522 char name[100]; 1523

1524 strncpy(name, peer_eth, sizeof(name)); 1525 strim(name); 1526 1527 peer_netdev = dev_get_by_name(&init_net, name); 1528 if (!peer_netdev) { 1529 e_dev_info("canot' find [%s]\n", name); 1530 return -EINVAL; 1531 } 1532 peer_adapter = netdev_priv(peer_netdev); 1533 1534 // check if in same slot 1535 if (PCI_SLOT(peer_adapter->pdev->devfn) != 1536 PCI_SLOT(adapter->pdev->devfn)) { 1537 e_dev_info("%s %s not in same slot\n", 1538 netdev_name(adapter->netdev), 1539 netdev_name(peer_adapter->netdev)); 1540 dev_put(peer_netdev); 1541 return -EINVAL; 1542 } 1543 1544 e_dev_info("%s: %s(%d,%d) <-> %s(%d,%d) en:%d\n", __func__, 1545 netdev_name(adapter->netdev), adapter->lane, adapter->port, 1546 netdev_name(peer_adapter->netdev), peer_adapter->lane, 1547 peer_adapter->port, en); 1548 1549 /* clear pf0/pf1 input port policy eth reg */ 1550 for (i = 0; i < MAX_PORT_NUM; i++) { 1551 wr32(&adapter->hw, RNPM_ETH_INPORT_POLICY_REG(i), 0); 1552 wr32(&peer_adapter->hw, RNPM_ETH_INPORT_POLICY_REG(i), 0); 1553 } 1554 1555 wr32(&adapter->hw, RNPM_ETH_INPORT_POLICY_VAL, 0); 1556 wr32(&peer_adapter->hw, RNPM_ETH_INPORT_POLICY_VAL, 0); 1557 1558 do_switch_loopback_set(adapter, en, adapter->lane, 1559 to_switch_port(peer_adapter)); 1560 1561 do_switch_loopback_set(peer_adapter, en, peer_adapter->lane, 1562 to_switch_port(adapter)); 1563 1564 if (peer_netdev) 1565 dev_put(peer_netdev); 1566 1567 return 0; 1568 } 1569 static ssize_t switch_loopback_on_store(struct device *dev, 1570 struct device_attribute *attr, 1571 const char *buf, size_t count) 1572 { 1573 struct rnpm_adapter *adapter = netdev_priv(to_net_device(dev)); 1574 1575 return _switch_loopback(adapter, buf, 1) == 0 ? count : -EINVAL; 1576 } 1577 static DEVICE_ATTR_WO(switch_loopback_on); 1578

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