* drivers/net/ethernet/airoha/airoha_eth.c:2139 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
@ 2026-07-01 21:55 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-07-01 21:55 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: 665159e246749578d4e4bfe106ee3b74edcdab18
commit: 7600fb3b41dd6ab65ed61169df1b6099044edf97 net: airoha: Rely __field_prep for non-constant masks
date: 4 months ago
:::::: branch date: 18 hours ago
:::::: commit date: 4 months ago
config: sh-randconfig-r072-20260702 (https://download.01.org/0day-ci/archive/20260702/202607020543.QhFmLp46-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: 7600fb3b41dd ("net: airoha: Rely __field_prep for non-constant masks")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202607020543.QhFmLp46-lkp@intel.com/
New smatch warnings:
drivers/net/ethernet/airoha/airoha_eth.c:2139 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2139 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2139 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2139 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
Old smatch warnings:
drivers/net/ethernet/airoha/airoha_eth.c:1727 airhoha_set_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1727 airhoha_set_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1727 airhoha_set_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1727 airhoha_set_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1782 airoha_dev_init() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1782 airoha_dev_init() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1782 airoha_dev_init() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:1782 airoha_dev_init() warn: subtract is higher precedence than shift
vim +2139 drivers/net/ethernet/airoha/airoha_eth.c
23020f04932701d drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2024-07-12 2110
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2111 static int airoha_qdma_set_chan_tx_sched(struct airoha_gdm_port *port,
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2112 int channel, enum tx_sched_mode mode,
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2113 const u16 *weights, u8 n_weights)
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2114 {
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2115 int i;
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2116
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2117 for (i = 0; i < AIROHA_NUM_TX_RING; i++)
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2118 airoha_qdma_clear(port->qdma, REG_QUEUE_CLOSE_CFG(channel),
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2119 TXQ_DISABLE_CHAN_QUEUE_MASK(channel, i));
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2120
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2121 for (i = 0; i < n_weights; i++) {
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2122 u32 status;
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2123 int err;
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2124
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2125 airoha_qdma_wr(port->qdma, REG_TXWRR_WEIGHT_CFG,
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2126 TWRR_RW_CMD_MASK |
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2127 FIELD_PREP(TWRR_CHAN_IDX_MASK, channel) |
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2128 FIELD_PREP(TWRR_QUEUE_IDX_MASK, i) |
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2129 FIELD_PREP(TWRR_VALUE_MASK, weights[i]));
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2130 err = read_poll_timeout(airoha_qdma_rr, status,
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2131 status & TWRR_RW_CMD_DONE,
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2132 USEC_PER_MSEC, 10 * USEC_PER_MSEC,
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2133 true, port->qdma,
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2134 REG_TXWRR_WEIGHT_CFG);
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2135 if (err)
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2136 return err;
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2137 }
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2138
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 @2139 airoha_qdma_rmw(port->qdma, REG_CHAN_QOS_MODE(channel >> 3),
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2140 CHAN_QOS_MODE_MASK(channel),
7600fb3b41dd6ab drivers/net/ethernet/airoha/airoha_eth.c Lorenzo Bianconi 2026-03-04 2141 __field_prep(CHAN_QOS_MODE_MASK(channel), mode));
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2142
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2143 return 0;
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2144 }
20bf7d07c956e5c drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2025-01-03 2145
:::::: The code at line 2139 was first introduced by commit
:::::: 20bf7d07c956e5c7a22d3076c599cbb7a6054917 net: airoha: Add sched ETS offload support
:::::: 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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2026-07-01 21:55 drivers/net/ethernet/airoha/airoha_eth.c:2139 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift kernel test robot
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