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SubjectRe: [PATCH net-next 10/11] net: marvell: prestera: add storm control (rate limiter) implementation
Hi Oleksandr,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on kselftest/next]
[also build test WARNING on net/master linus/master v5.13-rc6]
[cannot apply to net-next/master sparc-next/master next-20210615]
[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]

url: https://github.com/0day-ci/linux/commits/Oleksandr-Mazur/Marvell-Prestera-driver-implementation-of-devlink-functionality/20210616-112917
base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/d1e2db61850ee143f7aa180d34efb413f0956abd
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Oleksandr-Mazur/Marvell-Prestera-driver-implementation-of-devlink-functionality/20210616-112917
git checkout d1e2db61850ee143f7aa180d34efb413f0956abd
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

drivers/net/ethernet/marvell/prestera/prestera_devlink.c: In function 'prestera_devlink_port_param_set':
>> drivers/net/ethernet/marvell/prestera/prestera_devlink.c:693:26: warning: variable 'sw' set but not used [-Wunused-but-set-variable]
693 | struct prestera_switch *sw;
| ^~
drivers/net/ethernet/marvell/prestera/prestera_devlink.c: In function 'prestera_devlink_port_param_get':
drivers/net/ethernet/marvell/prestera/prestera_devlink.c:736:26: warning: variable 'sw' set but not used [-Wunused-but-set-variable]
736 | struct prestera_switch *sw;
| ^~


vim +/sw +693 drivers/net/ethernet/marvell/prestera/prestera_devlink.c

686
687 static int prestera_devlink_port_param_set(struct devlink_port *dl_port, u32 id,
688 struct devlink_param_gset_ctx *ctx)
689 {
690 struct prestera_strom_control_cfg *cfg;
691 u32 kbyte_per_sec_rate = ctx->val.vu32;
692 struct prestera_port *port;
> 693 struct prestera_switch *sw;
694 u32 *param_to_set;
695 u32 storm_type;
696 int ret;
697
698 port = container_of(dl_port, struct prestera_port, dl_port);
699 sw = devlink_priv(dl_port->devlink);
700 cfg = &port->storm_control;
701
702 switch (id) {
703 case PRESTERA_DEVLINK_PORT_PARAM_ID_BC_RATE:
704 param_to_set = &cfg->bc_kbyte_per_sec_rate;
705 storm_type = PRESTERA_PORT_STORM_CTL_TYPE_BC;
706 break;
707 case PRESTERA_DEVLINK_PORT_PARAM_ID_UC_UNK_RATE:
708 param_to_set = &cfg->unk_uc_kbyte_per_sec_rate;
709 storm_type = PRESTERA_PORT_STORM_CTL_TYPE_UC_UNK;
710 break;
711 case PRESTERA_DEVLINK_PORT_PARAM_ID_MC_RATE:
712 param_to_set = &cfg->unreg_mc_kbyte_per_sec_rate;
713 storm_type = PRESTERA_PORT_STORM_CTL_TYPE_MC;
714 break;
715 default:
716 return -EINVAL;
717 }
718
719 if (kbyte_per_sec_rate != *param_to_set) {
720 ret = prestera_hw_port_storm_control_cfg_set(port, storm_type,
721 kbyte_per_sec_rate);
722 if (ret)
723 return ret;
724
725 *param_to_set = kbyte_per_sec_rate;
726 }
727
728 return 0;
729 }
730

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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