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Message-ID: <20200625115215.GD2549@kadam>
Date:   Thu, 25 Jun 2020 14:52:15 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     kbuild@...ts.01.org, Antoine Tenart <antoine.tenart@...tlin.com>,
        davem@...emloft.net, andrew@...n.ch, f.fainelli@...il.com,
        hkallweit1@...il.com, richardcochran@...il.com,
        alexandre.belloni@...tlin.com, UNGLinuxDriver@...rochip.com
Cc:     lkp@...el.com, kbuild-all@...ts.01.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com
Subject: Re: [PATCH net-next v4 5/8] net: phy: mscc: 1588 block initialization

Hi Antoine,

url:    https://github.com/0day-ci/linux/commits/Antoine-Tenart/net-phy-mscc-PHC-and-timestamping-support/20200623-223712
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 8af7b4525acf5012b2f111a8b168b8647f2c8d60
config: x86_64-randconfig-m001-20200624 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0

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

smatch warnings:
drivers/net/phy/mscc/mscc_main.c:1472 vsc8584_config_init() error: double unlocked 'phydev->mdio.bus->mdio_lock' (orig line 1431)
drivers/net/phy/mscc/mscc_ptp.c:87 vsc85xx_ts_read_csr() error: uninitialized symbol 'blk_hw'.

# https://github.com/0day-ci/linux/commit/b3225965b276bd4f492184090bbac3a117bc77ae
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout b3225965b276bd4f492184090bbac3a117bc77ae
vim +1472 drivers/net/phy/mscc/mscc_main.c

a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1326  static int vsc8584_config_init(struct phy_device *phydev)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1327  {
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1328  	struct vsc8531_private *vsc8531 = phydev->priv;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1329  	int ret, i;
deb04e9c0ff2b4 drivers/net/phy/mscc/mscc_main.c Michael Walle     2020-05-06  1330  	u16 val;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1331  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1332  	phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1333  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1334  	mutex_lock(&phydev->mdio.bus->mdio_lock);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1335  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1336  	/* Some parts of the init sequence are identical for every PHY in the
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1337  	 * package. Some parts are modifying the GPIO register bank which is a
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1338  	 * set of registers that are affecting all PHYs, a few resetting the
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1339  	 * microprocessor common to all PHYs. The CRC check responsible of the
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1340  	 * checking the firmware within the 8051 microprocessor can only be
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1341  	 * accessed via the PHY whose internal address in the package is 0.
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1342  	 * All PHYs' interrupts mask register has to be zeroed before enabling
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1343  	 * any PHY's interrupt in this register.
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1344  	 * For all these reasons, we need to do the init sequence once and only
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1345  	 * once whatever is the first PHY in the package that is initialized and
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1346  	 * do the correct init sequence for all PHYs that are package-critical
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1347  	 * in this pre-init function.
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1348  	 */
deb04e9c0ff2b4 drivers/net/phy/mscc/mscc_main.c Michael Walle     2020-05-06  1349  	if (phy_package_init_once(phydev)) {
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1350  		/* The following switch statement assumes that the lowest
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1351  		 * nibble of the phy_id_mask is always 0. This works because
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1352  		 * the lowest nibble of the PHY_ID's below are also 0.
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1353  		 */
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1354  		WARN_ON(phydev->drv->phy_id_mask & 0xf);
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1355  
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1356  		switch (phydev->phy_id & phydev->drv->phy_id_mask) {
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1357  		case PHY_ID_VSC8504:
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1358  		case PHY_ID_VSC8552:
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1359  		case PHY_ID_VSC8572:
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1360  		case PHY_ID_VSC8574:
00d70d8e0e7811 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1361  			ret = vsc8574_config_pre_init(phydev);
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1362  			break;
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1363  		case PHY_ID_VSC856X:
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1364  		case PHY_ID_VSC8575:
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1365  		case PHY_ID_VSC8582:
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1366  		case PHY_ID_VSC8584:
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1367  			ret = vsc8584_config_pre_init(phydev);
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1368  			break;
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1369  		default:
00d70d8e0e7811 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1370  			ret = -EINVAL;
75a1ccfe6c726b drivers/net/phy/mscc.c           Bryan Whitehead   2019-11-13  1371  			break;
1e8795b1b20d27 drivers/net/phy/mscc.c           kbuild test robot 2019-11-16  1372  		}
00d70d8e0e7811 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1373  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1374  		if (ret)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1375  			goto err;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1376  	}
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1377  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1378  	phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS,
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1379  		       MSCC_PHY_PAGE_EXTENDED_GPIO);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1380  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1381  	val = phy_base_read(phydev, MSCC_PHY_MAC_CFG_FASTLINK);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1382  	val &= ~MAC_CFG_MASK;
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1383  	if (phydev->interface == PHY_INTERFACE_MODE_QSGMII) {
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1384  		val |= MAC_CFG_QSGMII;
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1385  	} else if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1386  		val |= MAC_CFG_SGMII;
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1387  	} else if (phy_interface_is_rgmii(phydev)) {
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1388  		val |= MAC_CFG_RGMII;
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1389  	} else {
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1390  		ret = -EINVAL;
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1391  		goto err;
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1392  	}
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1393  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1394  	ret = phy_base_write(phydev, MSCC_PHY_MAC_CFG_FASTLINK, val);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1395  	if (ret)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1396  		goto err;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1397  
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1398  	if (!phy_interface_is_rgmii(phydev)) {
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1399  		val = PROC_CMD_MCB_ACCESS_MAC_CONF | PROC_CMD_RST_CONF_PORT |
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1400  			PROC_CMD_READ_MOD_WRITE_PORT;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1401  		if (phydev->interface == PHY_INTERFACE_MODE_QSGMII)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1402  			val |= PROC_CMD_QSGMII_MAC;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1403  		else
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1404  			val |= PROC_CMD_SGMII_MAC;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1405  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1406  		ret = vsc8584_cmd(phydev, val);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1407  		if (ret)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1408  			goto err;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1409  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1410  		usleep_range(10000, 20000);
e8e4223046e19d drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1411  	}
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1412  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1413  	/* Disable SerDes for 100Base-FX */
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1414  	ret = vsc8584_cmd(phydev, PROC_CMD_FIBER_MEDIA_CONF |
49113d5e0c3f3f drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-06-05  1415  			  PROC_CMD_FIBER_PORT(vsc8531->addr) |
deb04e9c0ff2b4 drivers/net/phy/mscc/mscc_main.c Michael Walle     2020-05-06  1416  			  PROC_CMD_FIBER_DISABLE |
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1417  			  PROC_CMD_READ_MOD_WRITE_PORT |
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1418  			  PROC_CMD_RST_CONF_PORT | PROC_CMD_FIBER_100BASE_FX);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1419  	if (ret)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1420  		goto err;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1421  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1422  	/* Disable SerDes for 1000Base-X */
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1423  	ret = vsc8584_cmd(phydev, PROC_CMD_FIBER_MEDIA_CONF |
49113d5e0c3f3f drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-06-05  1424  			  PROC_CMD_FIBER_PORT(vsc8531->addr) |
deb04e9c0ff2b4 drivers/net/phy/mscc/mscc_main.c Michael Walle     2020-05-06  1425  			  PROC_CMD_FIBER_DISABLE |
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1426  			  PROC_CMD_READ_MOD_WRITE_PORT |
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1427  			  PROC_CMD_RST_CONF_PORT | PROC_CMD_FIBER_1000BASE_X);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1428  	if (ret)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1429  		goto err;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1430  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08 @1431  	mutex_unlock(&phydev->mdio.bus->mdio_lock);
                                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1432  
1bbe0ecc2a1a00 drivers/net/phy/mscc.c           Antoine Tenart    2020-01-13  1433  	ret = vsc8584_macsec_init(phydev);
1bbe0ecc2a1a00 drivers/net/phy/mscc.c           Antoine Tenart    2020-01-13  1434  	if (ret)
fa164e40c53b38 drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-13  1435  		return ret;
1bbe0ecc2a1a00 drivers/net/phy/mscc.c           Antoine Tenart    2020-01-13  1436  
b3225965b276bd drivers/net/phy/mscc/mscc_main.c Quentin Schulz    2020-06-23  1437  	ret = vsc8584_ptp_init(phydev);
b3225965b276bd drivers/net/phy/mscc/mscc_main.c Quentin Schulz    2020-06-23  1438  	if (ret)
b3225965b276bd drivers/net/phy/mscc/mscc_main.c Quentin Schulz    2020-06-23  1439  		goto err;
                                                                                                ^^^^^^^^
This should be a direct return.


b3225965b276bd drivers/net/phy/mscc/mscc_main.c Quentin Schulz    2020-06-23  1440  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1441  	phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1442  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1443  	val = phy_read(phydev, MSCC_PHY_EXT_PHY_CNTL_1);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1444  	val &= ~(MEDIA_OP_MODE_MASK | VSC8584_MAC_IF_SELECTION_MASK);
1ac7b090ec4618 drivers/net/phy/mscc.c           Antoine Tenart    2020-02-26  1445  	val |= (MEDIA_OP_MODE_COPPER << MEDIA_OP_MODE_POS) |
1ac7b090ec4618 drivers/net/phy/mscc.c           Antoine Tenart    2020-02-26  1446  	       (VSC8584_MAC_IF_SELECTION_SGMII << VSC8584_MAC_IF_SELECTION_POS);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1447  	ret = phy_write(phydev, MSCC_PHY_EXT_PHY_CNTL_1, val);
09d65e6d631c05 drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1448  	if (ret)
09d65e6d631c05 drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1449  		return ret;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1450  
2283a02b67d412 drivers/net/phy/mscc/mscc_main.c Vladimir Oltean   2020-03-24  1451  	if (phy_interface_is_rgmii(phydev)) {
2283a02b67d412 drivers/net/phy/mscc/mscc_main.c Vladimir Oltean   2020-03-24  1452  		ret = vsc85xx_rgmii_set_skews(phydev, VSC8572_RGMII_CNTL,
2283a02b67d412 drivers/net/phy/mscc/mscc_main.c Vladimir Oltean   2020-03-24  1453  					      VSC8572_RGMII_RX_DELAY_MASK,
2283a02b67d412 drivers/net/phy/mscc/mscc_main.c Vladimir Oltean   2020-03-24  1454  					      VSC8572_RGMII_TX_DELAY_MASK);
2283a02b67d412 drivers/net/phy/mscc/mscc_main.c Vladimir Oltean   2020-03-24  1455  		if (ret)
2283a02b67d412 drivers/net/phy/mscc/mscc_main.c Vladimir Oltean   2020-03-24  1456  			return ret;
2283a02b67d412 drivers/net/phy/mscc/mscc_main.c Vladimir Oltean   2020-03-24  1457  	}
dee48f78d02e15 drivers/net/phy/mscc/mscc_main.c Antoine Tenart    2020-03-19  1458  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1459  	ret = genphy_soft_reset(phydev);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1460  	if (ret)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1461  		return ret;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1462  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1463  	for (i = 0; i < vsc8531->nleds; i++) {
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1464  		ret = vsc85xx_led_cntl_set(phydev, i, vsc8531->leds_mode[i]);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1465  		if (ret)
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1466  			return ret;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1467  	}
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1468  
c227ce4423855b drivers/net/phy/mscc.c           Heiner Kallweit   2019-08-17  1469  	return 0;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1470  
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1471  err:
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08 @1472  	mutex_unlock(&phydev->mdio.bus->mdio_lock);
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1473  	return ret;
a5afc1678044a3 drivers/net/phy/mscc.c           Quentin Schulz    2018-10-08  1474  }

---
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