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Date: Sun, 28 May 2023 12:50:55 +0800
From: kernel test robot <lkp@...el.com>
To: Tristram.Ha@...rochip.com, "David S. Miller" <davem@...emloft.net>,
Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>
Cc: oe-kbuild-all@...ts.linux.dev, netdev@...r.kernel.org,
UNGLinuxDriver@...rochip.com,
Tristram Ha <Tristram.Ha@...rochip.com>
Subject: Re: [PATCH net-next] net: phy: smsc: add WoL support to
LAN8740/LAN8742 PHYs.
Hi,
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/Tristram-Ha-microchip-com/net-phy-smsc-add-WoL-support-to-LAN8740-LAN8742-PHYs/20230527-094102
base: net-next/main
patch link: https://lore.kernel.org/r/1685151574-2752-1-git-send-email-Tristram.Ha%40microchip.com
patch subject: [PATCH net-next] net: phy: smsc: add WoL support to LAN8740/LAN8742 PHYs.
config: i386-randconfig-s002-20230528 (https://download.01.org/0day-ci/archive/20230528/202305281254.hziqmfSD-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://github.com/intel-lab-lkp/linux/commit/a1e40c5a7a32445d5ae4541d4e57bbc4b5065057
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Tristram-Ha-microchip-com/net-phy-smsc-add-WoL-support-to-LAN8740-LAN8742-PHYs/20230527-094102
git checkout a1e40c5a7a32445d5ae4541d4e57bbc4b5065057
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 olddefconfig
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/net/phy/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305281254.hziqmfSD-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> drivers/net/phy/smsc.c:449:27: sparse: sparse: cast removes address space '__rcu' of expression
>> drivers/net/phy/smsc.c:485:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct list_head *addr_list @@ got struct list_head [noderef] __rcu * @@
drivers/net/phy/smsc.c:485:38: sparse: expected struct list_head *addr_list
drivers/net/phy/smsc.c:485:38: sparse: got struct list_head [noderef] __rcu *
>> drivers/net/phy/smsc.c:449:45: sparse: sparse: dereference of noderef expression
vim +/__rcu +449 drivers/net/phy/smsc.c
398
399 static int lan874x_set_wol(struct phy_device *phydev,
400 struct ethtool_wolinfo *wol)
401 {
402 struct net_device *ndev = phydev->attached_dev;
403 struct smsc_phy_priv *priv = phydev->priv;
404 u16 val, val_wucsr;
405 u8 data[128];
406 u8 datalen;
407 int rc;
408
409 if (wol->wolopts & WAKE_PHY)
410 return -EOPNOTSUPP;
411
412 /* lan874x has only one WoL filter pattern */
413 if ((wol->wolopts & (WAKE_ARP | WAKE_MCAST)) ==
414 (WAKE_ARP | WAKE_MCAST)) {
415 phydev_info(phydev,
416 "lan874x WoL supports one of ARP|MCAST at a time\n");
417 return -EOPNOTSUPP;
418 }
419
420 rc = phy_read_mmd(phydev, MDIO_MMD_PCS, MII_LAN874X_PHY_MMD_WOL_WUCSR);
421 if (rc < 0)
422 return rc;
423
424 val_wucsr = rc;
425
426 if (wol->wolopts & WAKE_UCAST)
427 val_wucsr |= MII_LAN874X_PHY_WOL_PFDAEN;
428 else
429 val_wucsr &= ~MII_LAN874X_PHY_WOL_PFDAEN;
430
431 if (wol->wolopts & WAKE_BCAST)
432 val_wucsr |= MII_LAN874X_PHY_WOL_BCSTEN;
433 else
434 val_wucsr &= ~MII_LAN874X_PHY_WOL_BCSTEN;
435
436 if (wol->wolopts & WAKE_MAGIC)
437 val_wucsr |= MII_LAN874X_PHY_WOL_MPEN;
438 else
439 val_wucsr &= ~MII_LAN874X_PHY_WOL_MPEN;
440
441 /* Need to use pattern matching */
442 if (wol->wolopts & (WAKE_ARP | WAKE_MCAST))
443 val_wucsr |= MII_LAN874X_PHY_WOL_WUEN;
444 else
445 val_wucsr &= ~MII_LAN874X_PHY_WOL_WUEN;
446
447 if (wol->wolopts & WAKE_ARP) {
448 const u8 *ip_addr =
> 449 ((const u8 *)&((ndev->ip_ptr)->ifa_list)->ifa_address);
450 const u16 mask[3] = { 0xF03F, 0x003F, 0x03C0 };
451 u8 pattern[42] = {
452 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
453 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
454 0x08, 0x06,
455 0x00, 0x01, 0x08, 0x00, 0x06, 0x04, 0x00, 0x01,
456 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
457 0x00, 0x00, 0x00, 0x00,
458 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
459 0x00, 0x00, 0x00, 0x00 };
460 u8 len = 42;
461
462 memcpy(&pattern[38], ip_addr, 4);
463 rc = lan874x_chk_wol_pattern(pattern, mask, len,
464 data, &datalen);
465 if (rc)
466 phydev_dbg(phydev, "pattern not valid at %d\n", rc);
467
468 /* Need to match broadcast destination address. */
469 val = MII_LAN874X_PHY_WOL_FILTER_BCSTEN;
470 rc = lan874x_set_wol_pattern(phydev, val, data, datalen, mask,
471 len);
472 if (rc < 0)
473 return rc;
474 priv->wol_arp = true;
475 }
476
477 if (wol->wolopts & WAKE_MCAST) {
478 u8 pattern[6] = { 0x33, 0x33, 0xFF, 0x00, 0x00, 0x00 };
479 u16 mask[1] = { 0x0007 };
480 u8 len = 3;
481
482 /* Try to match IPv6 Neighbor Solicitation. */
483 if (ndev->ip6_ptr) {
484 struct list_head *addr_list =
> 485 &ndev->ip6_ptr->addr_list;
486 struct inet6_ifaddr *ifa;
487
488 list_for_each_entry(ifa, addr_list, if_list) {
489 if (ifa->scope == IFA_LINK) {
490 memcpy(&pattern[3],
491 &ifa->addr.in6_u.u6_addr8[13],
492 3);
493 mask[0] = 0x003F;
494 len = 6;
495 break;
496 }
497 }
498 }
499 rc = lan874x_chk_wol_pattern(pattern, mask, len,
500 data, &datalen);
501 if (rc)
502 phydev_dbg(phydev, "pattern not valid at %d\n", rc);
503
504 /* Need to match multicast destination address. */
505 val = MII_LAN874X_PHY_WOL_FILTER_MCASTTEN;
506 rc = lan874x_set_wol_pattern(phydev, val, data, datalen, mask,
507 len);
508 if (rc < 0)
509 return rc;
510 priv->wol_arp = false;
511 }
512
513 if (wol->wolopts & (WAKE_MAGIC | WAKE_UCAST)) {
514 const u8 *mac = (const u8 *)ndev->dev_addr;
515
516 if (!is_valid_ether_addr(mac))
517 return -EINVAL;
518
519 rc = phy_write_mmd(phydev, MDIO_MMD_PCS,
520 MII_LAN874X_PHY_MMD_WOL_RX_ADDRC,
521 ((mac[1] << 8) | mac[0]));
522 if (rc < 0)
523 return rc;
524
525 rc = phy_write_mmd(phydev, MDIO_MMD_PCS,
526 MII_LAN874X_PHY_MMD_WOL_RX_ADDRB,
527 ((mac[3] << 8) | mac[2]));
528 if (rc < 0)
529 return rc;
530
531 rc = phy_write_mmd(phydev, MDIO_MMD_PCS,
532 MII_LAN874X_PHY_MMD_WOL_RX_ADDRA,
533 ((mac[5] << 8) | mac[4]));
534 if (rc < 0)
535 return rc;
536 }
537
538 rc = phy_write_mmd(phydev, MDIO_MMD_PCS, MII_LAN874X_PHY_MMD_WOL_WUCSR,
539 val_wucsr);
540 if (rc < 0)
541 return rc;
542
543 return 0;
544 }
545
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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