* drivers/net/ethernet/airoha/airoha_eth.c:1843 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
@ 2026-07-02 3:07 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-07-02 3:07 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp, Dan Carpenter
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Jakub Kicinski <kuba@kernel.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 4a50a141f05a8d1737661b19ee22ff8455b94409
commit: 842a7ee50d68d66afef4536bf3abdaaed2e0e5f5 net: airoha: Rename airoha_set_gdm2_loopback in airoha_enable_gdm2_loopback
date: 4 weeks ago
:::::: branch date: 3 hours ago
:::::: commit date: 4 weeks ago
config: sh-randconfig-r072-20260702 (https://download.01.org/0day-ci/archive/20260702/202607021124.3o2MGXEw-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 15.2.0
smatch: v0.5.0-9185-gbcc58b9c
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
| Fixes: 842a7ee50d68 ("net: airoha: Rename airoha_set_gdm2_loopback in airoha_enable_gdm2_loopback")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202607021124.3o2MGXEw-lkp@intel.com/
New smatch warnings:
drivers/net/ethernet/airoha/airoha_eth.c:1843 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1843 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1843 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1843 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
Old smatch warnings:
drivers/net/ethernet/airoha/airoha_eth.c:2254 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2254 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2254 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2254 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
vim +1843 drivers/net/ethernet/airoha/airoha_eth.c
23020f04932701 drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2024-07-12 1798
842a7ee50d68d6 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-27 1799 static int airoha_enable_gdm2_loopback(struct airoha_gdm_dev *dev)
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1800 {
528c5153a557f6 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-27 1801 struct airoha_gdm_port *port = dev->port;
528c5153a557f6 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-27 1802 struct airoha_eth *eth = dev->eth;
1acdfbdb516b32 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-04-12 1803 u32 val, pse_port, chan;
d647f254521975 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-04-17 1804 int i, src_port;
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1805
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1806 airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
985d4a55e64e43 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-20 1807 FE_PSE_PORT_DROP);
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1808 airoha_fe_clear(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1809 GDM_STRIP_CRC_MASK);
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1810
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1811 /* Enable GDM2 loopback */
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1812 airoha_fe_wr(eth, REG_GDM_TXCHN_EN(AIROHA_GDM2_IDX), 0xffffffff);
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1813 airoha_fe_wr(eth, REG_GDM_RXCHN_EN(AIROHA_GDM2_IDX), 0xffff);
e4e5ce823bdd46 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1814
e4e5ce823bdd46 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1815 chan = port->id == AIROHA_GDM3_IDX ? airoha_is_7581(eth) ? 4 : 3 : 0;
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1816 airoha_fe_rmw(eth, REG_GDM_LPBK_CFG(AIROHA_GDM2_IDX),
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1817 LPBK_CHAN_MASK | LPBK_MODE_MASK | LPBK_EN_MASK,
fea8cdf6738a8b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-08 1818 FIELD_PREP(LPBK_CHAN_MASK, chan) |
fea8cdf6738a8b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-08 1819 LBK_GAP_MODE_MASK | LBK_LEN_MODE_MASK |
fea8cdf6738a8b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-08 1820 LBK_CHAN_MODE_MASK | LPBK_EN_MASK);
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1821 airoha_fe_rmw(eth, REG_GDM_LEN_CFG(AIROHA_GDM2_IDX),
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1822 GDM_SHORT_LEN_MASK | GDM_LONG_LEN_MASK,
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1823 FIELD_PREP(GDM_SHORT_LEN_MASK, 60) |
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1824 FIELD_PREP(GDM_LONG_LEN_MASK, AIROHA_MAX_MTU));
985d4a55e64e43 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-20 1825 /* Forward the traffic to the proper GDM port */
985d4a55e64e43 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-20 1826 pse_port = port->id == AIROHA_GDM3_IDX ? FE_PSE_PORT_GDM3
985d4a55e64e43 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-20 1827 : FE_PSE_PORT_GDM4;
985d4a55e64e43 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-20 1828 airoha_set_gdm_port_fwd_cfg(eth, REG_GDM_FWD_CFG(AIROHA_GDM2_IDX),
985d4a55e64e43 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-20 1829 pse_port);
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1830
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1831 /* Disable VIP and IFC for GDM2 */
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1832 airoha_fe_clear(eth, REG_FE_VIP_PORT_EN, BIT(AIROHA_GDM2_IDX));
4d513329b87c1b drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-01-05 1833 airoha_fe_clear(eth, REG_FE_IFC_PORT_EN, BIT(AIROHA_GDM2_IDX));
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1834
c06a2f2903f6fb drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-04-28 1835 src_port = eth->soc->ops.get_sport(port, port->nbq);
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1836 if (src_port < 0)
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1837 return src_port;
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1838
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1839 airoha_fe_rmw(eth, REG_FE_WAN_PORT,
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1840 WAN1_EN_MASK | WAN1_MASK | WAN0_MASK,
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1841 FIELD_PREP(WAN0_MASK, src_port));
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1842 val = src_port & SP_CPORT_DFT_MASK;
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 @1843 airoha_fe_rmw(eth,
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1844 REG_SP_DFT_CPORT(src_port >> fls(SP_CPORT_DFT_MASK)),
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1845 SP_CPORT_MASK(val),
7600fb3b41dd6a drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-03-04 1846 __field_prep(SP_CPORT_MASK(val), FE_PSE_PORT_CDM2));
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1847
d647f254521975 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-04-17 1848 for (i = 0; i < eth->soc->num_ppe; i++)
528c5153a557f6 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-05-27 1849 airoha_ppe_set_cpu_port(dev, i, AIROHA_GDM2_IDX);
d647f254521975 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-04-17 1850
bf3471e6e6c021 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-03-06 1851 if (port->id == AIROHA_GDM4_IDX && airoha_is_7581(eth)) {
35c2c39832e569 drivers/net/ethernet/airoha/airoha_eth.c Jakub Kicinski 2026-04-14 1852 u32 mask = FC_ID_OF_SRC_PORT_MASK(port->nbq);
bf3471e6e6c021 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-03-06 1853
bf3471e6e6c021 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-03-06 1854 airoha_fe_rmw(eth, REG_SRC_PORT_FC_MAP6, mask,
bf3471e6e6c021 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-03-06 1855 __field_prep(mask, AIROHA_GDM2_IDX));
bf3471e6e6c021 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-03-06 1856 }
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1857
9d5b5219f672c8 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-10-17 1858 return 0;
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1859 }
9cd451d414f6e2 drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2025-02-28 1860
:::::: The code at line 1843 was first introduced by commit
:::::: 9cd451d414f6e29f507a216fb3b19fa68c011f8c net: airoha: Add loopback support for GDM2
:::::: TO: Lorenzo Bianconi <lorenzo@kernel.org>
:::::: CC: Paolo Abeni <pabeni@redhat.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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