netdev - Re: [PATCH net-next 5/6] net: dsa: realtek-smi: add rtl8365mb subdriver for RTL8365MB-VC

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Date:   Wed, 13 Oct 2021 04:58:25 +0800
From:   kernel test robot <lkp@...el.com>
To:     Alvin Šipraga <alvin@...s.dk>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     kbuild-all@...ts.01.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 5/6] net: dsa: realtek-smi: add rtl8365mb
 subdriver for RTL8365MB-VC

Hi "Alvin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Alvin-ipraga/net-dsa-add-support-for-RTL8365MB-VC/20211012-204007
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 177c92353be935db555d0d08729e871145ec698c
config: i386-randconfig-a001-20211012 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/1f05b453a6d1b64bb7cefff2daa90d9b1e7bce77
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Alvin-ipraga/net-dsa-add-support-for-RTL8365MB-VC/20211012-204007
        git checkout 1f05b453a6d1b64bb7cefff2daa90d9b1e7bce77
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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

All warnings (new ones prefixed by >>):

   drivers/net/dsa/rtl8365mb.c: In function 'rtl8365mb_setup':
>> drivers/net/dsa/rtl8365mb.c:1428:20: warning: variable 'mb' set but not used [-Wunused-but-set-variable]
    1428 |  struct rtl8365mb *mb;
         |                    ^~


vim +/mb +1428 drivers/net/dsa/rtl8365mb.c

  1424	
  1425	static int rtl8365mb_setup(struct dsa_switch *ds)
  1426	{
  1427		struct realtek_smi *smi = ds->priv;
> 1428		struct rtl8365mb *mb;
  1429		int ret;
  1430		int i;
  1431	
  1432		mb = smi->chip_data;
  1433	
  1434		ret = rtl8365mb_reset_chip(smi);
  1435		if (ret) {
  1436			dev_err(smi->dev, "failed to reset chip: %d\n", ret);
  1437			return ret;
  1438		}
  1439	
  1440		/* Configure switch to vendor-defined initial state */
  1441		ret = rtl8365mb_switch_init(smi);
  1442		if (ret) {
  1443			dev_err(smi->dev, "failed to initialize switch: %d\n", ret);
  1444			return ret;
  1445		}
  1446	
  1447		/* Configure CPU tagging */
  1448		ret = rtl8365mb_cpu_config(smi);
  1449		if (ret)
  1450			return ret;
  1451	
  1452		/* Configure ports in standalone mode */
  1453		for (i = 0; i < smi->num_ports; i++) {
  1454			/* Forward only to the CPU */
  1455			ret = rtl8365mb_port_set_isolation(smi, i, BIT(smi->cpu_port));
  1456			if (ret)
  1457				return ret;
  1458	
  1459			/* Disable learning */
  1460			ret = rtl8365mb_port_set_learning(smi, i, false);
  1461			if (ret)
  1462				return ret;
  1463	
  1464			/* Set the initial STP state of all ports to DISABLED, otherwise
  1465			 * ports will still forward frames to the CPU despite being
  1466			 * administratively down by default.
  1467			 */
  1468			rtl8365mb_port_stp_state_set(smi->ds, i, BR_STATE_DISABLED);
  1469		}
  1470	
  1471		/* Set maximum packet length to 1536 bytes */
  1472		ret = regmap_update_bits(smi->map, RTL8365MB_CFG0_MAX_LEN_REG,
  1473					 RTL8365MB_CFG0_MAX_LEN_MASK,
  1474					 FIELD_PREP(RTL8365MB_CFG0_MAX_LEN_MASK, 1536));
  1475		if (ret)
  1476			return ret;
  1477	
  1478		/* Set up cascading IRQs */
  1479		ret = rtl8365mb_irq_setup(smi);
  1480		if (ret == -EPROBE_DEFER)
  1481			return ret;
  1482		else if (ret)
  1483			dev_info(smi->dev, "no interrupt support\n");
  1484	
  1485		ret = realtek_smi_setup_mdio(smi);
  1486		if (ret) {
  1487			dev_err(smi->dev, "could not set up MDIO bus\n");
  1488			return -ENODEV;
  1489		}
  1490	
  1491		return ret;
  1492	}
  1493	

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

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