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Message-ID: <202403280937.NcxkkP5s-lkp@intel.com>
Date: Thu, 28 Mar 2024 09:31:15 +0800
From: kernel test robot <lkp@...el.com>
To: Pawel Dembicki <paweldembicki@...il.com>, netdev@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Linus Walleij <linus.walleij@...aro.org>,
Simon Horman <horms@...nel.org>,
Pawel Dembicki <paweldembicki@...il.com>,
Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Claudiu Manoil <claudiu.manoil@....com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
UNGLinuxDriver@...rochip.com, Russell King <linux@...linux.org.uk>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v7 07/16] net: dsa: vsc73xx: Add vlan filtering
Hi Pawel,
kernel test robot noticed the following build warnings:
[auto build test WARNING on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Pawel-Dembicki/net-dsa-vsc73xx-use-read_poll_timeout-instead-delay-loop/20240326-053458
base: net-next/main
patch link: https://lore.kernel.org/r/20240325204344.2298241-8-paweldembicki%40gmail.com
patch subject: [PATCH net-next v7 07/16] net: dsa: vsc73xx: Add vlan filtering
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240328/202403280937.NcxkkP5s-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 23de3862dce582ce91c1aa914467d982cb1a73b4)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240328/202403280937.NcxkkP5s-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403280937.NcxkkP5s-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/net/dsa/vitesse-vsc73xx-core.c:20:
In file included from include/linux/iopoll.h:14:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
| ^
In file included from drivers/net/dsa/vitesse-vsc73xx-core.c:20:
In file included from include/linux/iopoll.h:14:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
In file included from drivers/net/dsa/vitesse-vsc73xx-core.c:20:
In file included from include/linux/iopoll.h:14:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:328:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
In file included from drivers/net/dsa/vitesse-vsc73xx-core.c:22:
In file included from include/linux/of_mdio.h:12:
In file included from include/linux/phy.h:16:
In file included from include/linux/ethtool.h:18:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:10:
In file included from include/linux/mm.h:2208:
include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
>> drivers/net/dsa/vitesse-vsc73xx-core.c:1451:11: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
1451 | else if (vsc73xx_port_get_pvid(vsc, port, &vid, false) &&
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1452 | vid == vlan->vid)
| ~~~~~~~~~~~~~~~~
drivers/net/dsa/vitesse-vsc73xx-core.c:1455:6: note: uninitialized use occurs here
1455 | if (ret)
| ^~~
drivers/net/dsa/vitesse-vsc73xx-core.c:1451:7: note: remove the 'if' if its condition is always true
1451 | else if (vsc73xx_port_get_pvid(vsc, port, &vid, false) &&
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1452 | vid == vlan->vid)
| ~~~~~~~~~~~~~~~~~
1453 | ret = vsc73xx_vlan_clear_pvid(vsc, port, operate_on_storage,
>> drivers/net/dsa/vitesse-vsc73xx-core.c:1451:11: warning: variable 'ret' is used uninitialized whenever '&&' condition is false [-Wsometimes-uninitialized]
1451 | else if (vsc73xx_port_get_pvid(vsc, port, &vid, false) &&
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/dsa/vitesse-vsc73xx-core.c:1455:6: note: uninitialized use occurs here
1455 | if (ret)
| ^~~
drivers/net/dsa/vitesse-vsc73xx-core.c:1451:11: note: remove the '&&' if its condition is always true
1451 | else if (vsc73xx_port_get_pvid(vsc, port, &vid, false) &&
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/dsa/vitesse-vsc73xx-core.c:1393:9: note: initialize the variable 'ret' to silence this warning
1393 | int ret;
| ^
| = 0
9 warnings generated.
vim +1451 drivers/net/dsa/vitesse-vsc73xx-core.c
1380
1381 static int vsc73xx_port_vlan_add(struct dsa_switch *ds, int port,
1382 const struct switchdev_obj_port_vlan *vlan,
1383 struct netlink_ext_ack *extack)
1384 {
1385 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
1386 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
1387 struct dsa_port *dp = dsa_to_port(ds, port);
1388 enum vsc73xx_port_vlan_conf port_vlan_conf;
1389 struct vsc73xx_bridge_vlan *vsc73xx_vlan;
1390 struct vsc73xx_vlan_summary summary;
1391 struct vsc73xx *vsc = ds->priv;
1392 bool operate_on_storage;
1393 int ret;
1394 u16 vid;
1395
1396 /* Be sure to deny alterations to the configuration done by tag_8021q.
1397 */
1398 if (vid_is_dsa_8021q(vlan->vid)) {
1399 NL_SET_ERR_MSG_MOD(extack,
1400 "Range 3072-4095 reserved for dsa_8021q operation");
1401 return -EBUSY;
1402 }
1403
1404 /* The processed vlan->vid is excluded from the search because the VLAN
1405 * can be re-added with a different set of flags, so it's easiest to
1406 * ignore its old flags from the VLAN database software copy.
1407 */
1408 vsc73xx_bridge_vlan_summary(vsc, port, &summary, vlan->vid);
1409
1410 /* VSC73XX allow only three untagged states: none, one or all */
1411 if ((untagged && summary.num_tagged > 0 && summary.num_untagged > 0) ||
1412 (!untagged && summary.num_untagged > 1)) {
1413 NL_SET_ERR_MSG_MOD(extack,
1414 "Port can have only none, one or all untagged vlan");
1415 return -EBUSY;
1416 }
1417
1418 vsc73xx_vlan = vsc73xx_bridge_vlan_find(vsc, vlan->vid);
1419
1420 if (!vsc73xx_vlan) {
1421 vsc73xx_vlan = kzalloc(sizeof(*vsc73xx_vlan), GFP_KERNEL);
1422 if (!vsc73xx_vlan)
1423 return -ENOMEM;
1424
1425 vsc73xx_vlan->vid = vlan->vid;
1426 vsc73xx_vlan->portmask = 0;
1427 vsc73xx_vlan->untagged = 0;
1428
1429 INIT_LIST_HEAD(&vsc73xx_vlan->list);
1430 list_add_tail(&vsc73xx_vlan->list, &vsc->vlans);
1431 }
1432
1433 vsc73xx_vlan->portmask |= BIT(port);
1434
1435 if (untagged)
1436 vsc73xx_vlan->untagged |= BIT(port);
1437 else
1438 vsc73xx_vlan->untagged &= ~BIT(port);
1439
1440 /* CPU port must be always tagged because port separation is based on
1441 * tag_8021q.
1442 */
1443 if (port == CPU_PORT)
1444 goto update_vlan_table;
1445
1446 operate_on_storage = vsc73xx_tag_8021q_active(dp);
1447
1448 if (pvid)
1449 ret = vsc73xx_vlan_set_pvid(vsc, port, vlan->vid,
1450 operate_on_storage, false);
> 1451 else if (vsc73xx_port_get_pvid(vsc, port, &vid, false) &&
1452 vid == vlan->vid)
1453 ret = vsc73xx_vlan_clear_pvid(vsc, port, operate_on_storage,
1454 false);
1455 if (ret)
1456 goto err;
1457
1458 if (operate_on_storage)
1459 goto update_vlan_table;
1460
1461 port_vlan_conf = VSC73XX_VLAN_FILTER;
1462
1463 if (summary.num_tagged == 0 && untagged)
1464 port_vlan_conf = VSC73XX_VLAN_FILTER_UNTAG_ALL;
1465 vsc73xx_set_vlan_conf(vsc, port, port_vlan_conf);
1466
1467 if (port_vlan_conf == VSC73XX_VLAN_FILTER_UNTAG_ALL)
1468 goto update_vlan_table;
1469
1470 if (untagged) {
1471 ret = vsc73xx_vlan_set_untagged_hw(vsc, port, vlan->vid);
1472 } else if (summary.num_untagged == 1) {
1473 vid = vsc73xx_find_first_vlan_untagged(vsc, port);
1474 ret = vsc73xx_vlan_set_untagged_hw(vsc, port, vid);
1475 }
1476 if (ret)
1477 goto err;
1478
1479 update_vlan_table:
1480 ret = vsc73xx_update_vlan_table(vsc, port, vlan->vid, true);
1481 if (!ret)
1482 return 0;
1483 err:
1484 list_del(&vsc73xx_vlan->list);
1485 kfree(vsc73xx_vlan);
1486 return ret;
1487 }
1488
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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