Re: [PATCH] mailbox: rio : implement discovery for all

kernel test robot
2026-01-01T18:24:46Z

[also build test ERROR on v6.19-rc3 next-20251219]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Navid-Derakhshandeh/mailbox-rio-implement-discovery-for-all/20251230-031149
base: linus/master
patch link: https://lore.kernel.org/r/20251229190724.20608-1-navid.derakhshandeh1%40gmail.com
patch subject: [PATCH] mailbox: rio : implement discovery for all
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20260102/202601020241.CwU3w5vS-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260102/202601020241.CwU3w5vS-lkp@intel.com/reproduce)

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/202601020241.CwU3w5vS-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

>> drivers/rapidio/rio.c:1081:4: error: call to undeclared function 'rio_scan_mport'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1081 | rio_scan_mport(net->hport);
| ^
>> drivers/rapidio/rio.c:1074:6: warning: no previous prototype for function 'rio_restart_discovery_all' [-Wmissing-prototypes]
1074 | void rio_restart_discovery_all(void)
| ^
drivers/rapidio/rio.c:1074:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
1074 | void rio_restart_discovery_all(void)
| ^
| static
drivers/rapidio/rio.c:1109:3: error: call to undeclared function 'rio_scan_mport'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1109 | rio_scan_mport(net->hport);
| ^
drivers/rapidio/rio.c:1119:3: error: call to undeclared function 'rio_scan_mport'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1119 | rio_scan_mport(net->hport);
| ^
1 warning and 3 errors generated.

vim +/rio_scan_mport +1081 drivers/rapidio/rio.c

1021
1022 /**
1023 * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
1024 * returns link-response (if requested).
1025 * @rdev: RIO devive to issue Input-status command
1026 * @pnum: Device port number to issue the command
1027 * @lnkresp: Response from a link partner
1028 */
1029 static int
1030 rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp)
1031 {
1032 u32 regval;
1033 int checkcount;
1034
1035 if (lnkresp) {
1036 /* Read from link maintenance response register
1037 * to clear valid bit */
1038 rio_read_config_32(rdev,
1039 RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, pnum),
1040 &regval);
1041 udelay(50);
1042 }
1043
1044 /* Issue Input-status command */
1045 rio_write_config_32(rdev,
1046 RIO_DEV_PORT_N_MNT_REQ_CSR(rdev, pnum),
1047 RIO_MNT_REQ_CMD_IS);
1048
1049 /* Exit if the response is not expected */
1050 if (!lnkresp)
1051 return 0;
1052
1053 checkcount = 3;
1054 while (checkcount--) {
1055 udelay(50);
1056 rio_read_config_32(rdev,
1057 RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, pnum),
1058 &regval);
1059 if (regval & RIO_PORT_N_MNT_RSP_RVAL) {
1060 *lnkresp = regval;
1061 return 0;
1062 }
1063 }
1064
1065 return -EIO;
1066 }
1067 /**
1068 * rio_restart_discovery_all - Restart discovery on all RapidIO networks
1069 *
1070 * Iterates through all registered RapidIO networks and restarts topology
1071 * discovery process from each network's host port. Intended to be used
1072 * after a system-wide error or configuration change.
1073 */
> 1074 void rio_restart_discovery_all(void)