Hi Dong, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: d33d9222dd0abdddb305cbcd6dddf6763e0bcd5a commit: e53494b741272933726616122ea77143d9742631 [3011/3011] drivers: initial support for rnp drivers from Mucse Technology config: arm64-randconfig-004-20250704 (https://download.01.org/0day-ci/archive/20250704/202507041337.WpaxtPMv-lkp@i...) compiler: aarch64-linux-gcc (GCC) 10.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250704/202507041337.WpaxtPMv-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/202507041337.WpaxtPMv-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from drivers/net/ethernet/mucse/rnp/rnp.h:21, from drivers/net/ethernet/mucse/rnp/rnp_sysfs.c:13: drivers/net/ethernet/mucse/rnp/rnp_common.h: In function '_rnp_skb_dump': drivers/net/ethernet/mucse/rnp/rnp_common.h:336:22: warning: suggest braces around empty body in an 'if' statement [-Wempty-body] 336 | &dev->features); | ^ drivers/net/ethernet/mucse/rnp/rnp_common.h:299:16: warning: variable 'tailroom' set but not used [-Wunused-but-set-variable] 299 | int headroom, tailroom; | ^~~~~~~~ drivers/net/ethernet/mucse/rnp/rnp_common.h:299:6: warning: variable 'headroom' set but not used [-Wunused-but-set-variable] 299 | int headroom, tailroom; | ^~~~~~~~ drivers/net/ethernet/mucse/rnp/rnp_common.h:298:16: warning: variable 'has_trans' set but not used [-Wunused-but-set-variable] 298 | bool has_mac, has_trans; | ^~~~~~~~~ drivers/net/ethernet/mucse/rnp/rnp_common.h:298:7: warning: variable 'has_mac' set but not used [-Wunused-but-set-variable] 298 | bool has_mac, has_trans; | ^~~~~~~ drivers/net/ethernet/mucse/rnp/rnp_sysfs.c: At top level: drivers/net/ethernet/mucse/rnp/rnp_sysfs.c:1214:5: warning: no previous prototype for 'rnp_mbx_get_pn_sn' [-Wmissing-prototypes] 1214 | int rnp_mbx_get_pn_sn(struct rnp_hw *hw, char pn[33], char sn[33]) | ^~~~~~~~~~~~~~~~~ drivers/net/ethernet/mucse/rnp/rnp_sysfs.c: In function '_switch_loopback':

...

drivers/net/ethernet/mucse/rnp/rnp_sysfs.c:1958:2: warning: 'strncpy' specified bound 100 equals destination size [-Wstringop-truncation] 1958 | strncpy(name, peer_eth, sizeof(name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/strncpy +1958 drivers/net/ethernet/mucse/rnp/rnp_sysfs.c 1950 1951 static ssize_t _switch_loopback(struct rnp_adapter *adapter, 1952 const char *peer_eth, int en) 1953 { 1954 struct net_device *peer_netdev = NULL; 1955 struct rnp_adapter *peer_adapter = NULL; 1956 char name[100]; 1957

1958 strncpy(name, peer_eth, sizeof(name)); 1959 strim(name); 1960 1961 pr_info("%s: nr_lane:%d peer_lane:%s en:%d\n", __func__, 0, 1962 peer_eth, en); 1963 1964 peer_netdev = dev_get_by_name(&init_net, name); 1965 if (!peer_netdev) { 1966 e_err(drv, "canot' find %s\n", name); 1967 return -EINVAL; 1968 } 1969 peer_adapter = netdev_priv(peer_netdev); 1970 1971 if (PCI_SLOT(peer_adapter->pdev->devfn) != 1972 PCI_SLOT(adapter->pdev->devfn)) { 1973 e_err(drv, "%s %s not in same slot\n", 1974 netdev_name(adapter->netdev), 1975 netdev_name(peer_adapter->netdev)); 1976 dev_put(peer_netdev); 1977 return -EINVAL; 1978 } 1979 1980 1981 do_switch_loopback_set(adapter, en, 0, 1982 rnp_is_pf1(&peer_adapter->hw) ? 4 : 0); 1983 do_switch_loopback_set(peer_adapter, en, 0, 1984 rnp_is_pf1(&adapter->hw) ? 4 : 0); 1985 1986 if (peer_netdev) 1987 dev_put(peer_netdev); 1988 1989 return 0; 1990 } 1991 static ssize_t switch_loopback_on_store(struct device *dev, 1992 struct device_attribute *attr, 1993 const char *buf, size_t count) 1994 { 1995 struct rnp_adapter *adapter = netdev_priv(to_net_device(dev)); 1996 1997 return _switch_loopback(adapter, buf, 1) == 0 ? count : -EINVAL; 1998 } 1999

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