[linux-next:master 5319/10910] drivers/net/ethernet/airoha/airoha_eth.c:513 airoha_fe_lro_rxq_enable() warn: subtract is higher precedence than shift

[linux-next:master 5319/10910] drivers/net/ethernet/airoha/airoha_eth.c:513 airoha_fe_lro_rxq_enable() warn: subtract is higher precedence than shift

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Lorenzo Bianconi <lorenzo@kernel.org>
CC: Jakub Kicinski <kuba@kernel.org>
CC: Simon Horman <horms@kernel.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   f5f84daefcd92d7a630066635ecea1433ed5eac7
commit: a952507ca094d4e77bea78b462a0482d3c546c9e [5319/10910] net: airoha: add LRO offload support
:::::: branch date: 2 days ago
:::::: commit date: 12 days ago
config: mips-randconfig-r2200-20260926 (https://download.01.org/0day-ci/archive/20260927/202609270710.uw49PknB-lkp@intel.com/config)
compiler: mips64-linux-gcc (GCC) 15.2.0
smatch: v0.5.0-9187-g5189e3fb

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@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202609270710.uw49PknB-lkp@intel.com/

New smatch warnings:
drivers/net/ethernet/airoha/airoha_eth.c:513 airoha_fe_lro_rxq_enable() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:513 airoha_fe_lro_rxq_enable() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:513 airoha_fe_lro_rxq_enable() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:513 airoha_fe_lro_rxq_enable() warn: subtract is higher precedence than shift

Old smatch warnings:
drivers/net/ethernet/airoha/airoha_eth.c:2304 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2304 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2304 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2304 airoha_enable_gdm2_loopback() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2862 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2862 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2862 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift
drivers/net/ethernet/airoha/airoha_eth.c:2862 airoha_qdma_set_chan_tx_sched() warn: subtract is higher precedence than shift

vim +513 drivers/net/ethernet/airoha/airoha_eth.c

23020f04932701d drivers/net/ethernet/mediatek/airoha_eth.c Lorenzo Bianconi 2024-07-12  495  
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  496  static void airoha_fe_lro_rxq_enable(struct airoha_eth *eth, int qdma_id,
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  497  				     int lro_queue_index, int qid,
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  498  				     int buf_size)
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  499  {
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  500  	int id = qdma_id + 1;
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  501  
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  502  	airoha_fe_rmw(eth, REG_CDM_LRO_LIMIT(id),
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  503  		      CDM_LRO_AGG_NUM_MASK | CDM_LRO_AGG_SIZE_MASK,
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  504  		      FIELD_PREP(CDM_LRO_AGG_SIZE_MASK, buf_size) |
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  505  		      FIELD_PREP(CDM_LRO_AGG_NUM_MASK,
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  506  				 AIROHA_RXQ_LRO_MAX_AGG_COUNT));
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  507  	airoha_fe_rmw(eth, REG_CDM_LRO_AGE_TIME(id),
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  508  		      CDM_LRO_AGE_TIME_MASK | CDM_LRO_AGG_TIME_MASK,
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  509  		      FIELD_PREP(CDM_LRO_AGE_TIME_MASK,
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  510  				 AIROHA_RXQ_LRO_MAX_AGE_TIME) |
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  511  		      FIELD_PREP(CDM_LRO_AGG_TIME_MASK,
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  512  				 AIROHA_RXQ_LRO_MAX_AGG_TIME));
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09 @513  	airoha_fe_rmw(eth, REG_CDM_LRO_RXQ(id, lro_queue_index),
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  514  		      LRO_RXQ_MASK(lro_queue_index),
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  515  		      __field_prep(LRO_RXQ_MASK(lro_queue_index), qid));
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  516  	airoha_fe_set(eth, REG_CDM_LRO_EN(id), BIT(lro_queue_index));
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  517  }
a952507ca094d4e drivers/net/ethernet/airoha/airoha_eth.c   Lorenzo Bianconi 2026-09-09  518  

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