Subject: Re: [PATCH] dpaa2-switch: fix flooding domain among multiple vlans

From: kernel test robot <[email-masked]>
Date: Fri, 30 Aug 2024 02:14:31 +0800

Hi Wan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.11-rc5 next-20240829]
[cannot apply to horms-ipvs/master]
[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/Wan-Junjie/dpaa2-switch-fix-flooding-domain-among-multiple-vlans/20240827-191121
base:   linus/master
patch link:    https://lore.kernel.org/r/20240827110855.3186502-1-junjie.wan%40inceptio.ai
patch subject: [PATCH] dpaa2-switch: fix flooding domain among multiple vlans
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20240830/[email-masked]/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240830/[email-masked]/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 <[email-masked]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c: In function 'dpaa2_switch_fdb_set_egress_flood':
>> drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c:179:18: warning: unused variable 'i' [-Wunused-variable]
     179 |         int err, i;
         |                  ^
   drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c: In function 'dpaa2_switch_port_flood':
>> drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c:1782:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    1782 |         if (err)
         |         ^~
   drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c:1784:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    1784 |                 return err;
         |                 ^~~~~~

vim +/i +179 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c

   175	
   176	static int dpaa2_switch_fdb_set_egress_flood(struct ethsw_core *ethsw, u16 fdb_id)
   177	{
   178		struct dpsw_egress_flood_cfg flood_cfg;
 > 179		int err, i;
   180	
   181		/* Setup broadcast flooding domain */
   182		dpaa2_switch_fdb_get_flood_cfg(ethsw, fdb_id, DPSW_BROADCAST, &flood_cfg);
   183		err = dpsw_set_egress_flood(ethsw->mc_io, 0, ethsw->dpsw_handle,
   184					    &flood_cfg);
   185		if (err) {
   186			dev_err(ethsw->dev, "dpsw_set_egress_flood() = %d\n", err);
   187			return err;
   188		}
   189	
   190		/* Setup unknown flooding domain */
   191		dpaa2_switch_fdb_get_flood_cfg(ethsw, fdb_id, DPSW_FLOODING, &flood_cfg);
   192		err = dpsw_set_egress_flood(ethsw->mc_io, 0, ethsw->dpsw_handle,
   193					    &flood_cfg);
   194		if (err) {
   195			dev_err(ethsw->dev, "dpsw_set_egress_flood() = %d\n", err);
   196			return err;
   197		}
   198	
   199		return 0;
   200	}
   201	

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