netdev - [net-next:main 17/18] drivers/net/ethernet/ti/am65-cpsw-nuss.c:478:9: warning: cast to smaller integer type 'enum am65_cpsw_tx_buf

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Date: Tue, 16 Apr 2024 09:41:43 +0800
From: kernel test robot <lkp@...el.com>
To: Julien Panis <jpanis@...libre.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	netdev@...r.kernel.org, Jacob Keller <jacob.e.keller@...el.com>
Subject: [net-next:main 17/18]
 drivers/net/ethernet/ti/am65-cpsw-nuss.c:478:9: warning: cast to smaller
 integer type 'enum am65_cpsw_tx_buf_type' from 'void *'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git main
head:   bb72159c0ad193bbaa842e41316f0f6b6972e821
commit: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 [17/18] net: ethernet: ti: am65-cpsw: Add minimal XDP support
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20240416/202404160955.THhpKGGa-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7089c359a3845323f6f30c44a47dd901f2edfe63)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240416/202404160955.THhpKGGa-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/202404160955.THhpKGGa-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/net/ethernet/ti/am65-cpsw-nuss.c:8:
   In file included from include/linux/bpf_trace.h:5:
   In file included from include/trace/events/xdp.h:8:
   In file included from include/linux/netdevice.h:38:
   In file included from include/net/net_namespace.h:43:
   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:8:
   In file included from include/linux/cacheflush.h:5:
   In file included from arch/arm64/include/asm/cacheflush.h:11:
   In file included from include/linux/kgdb.h:19:
   In file included from include/linux/kprobes.h:28:
   In file included from include/linux/ftrace.h:13:
   In file included from include/linux/kallsyms.h:13:
   In file included from include/linux/mm.h:2208:
   include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     508 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     509 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     515 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     516 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   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_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     527 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     528 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     536 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     537 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> drivers/net/ethernet/ti/am65-cpsw-nuss.c:478:9: warning: cast to smaller integer type 'enum am65_cpsw_tx_buf_type' from 'void *' [-Wvoid-pointer-to-enum-cast]
     478 |         return (enum am65_cpsw_tx_buf_type)k3_cppi_desc_pool_desc_info(tx_chn->desc_pool,
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     479 |                                                                        desc_idx);
         |                                                                        ~~~~~~~~~
   6 warnings generated.


vim +478 drivers/net/ethernet/ti/am65-cpsw-nuss.c

   467	
   468	static enum am65_cpsw_tx_buf_type am65_cpsw_nuss_buf_type(struct am65_cpsw_tx_chn *tx_chn,
   469								  dma_addr_t desc_dma)
   470	{
   471		struct cppi5_host_desc_t *desc_tx;
   472		int desc_idx;
   473	
   474		desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma);
   475		desc_idx = am65_cpsw_nuss_desc_idx(tx_chn->desc_pool, desc_tx,
   476						   tx_chn->dsize_log2);
   477	
 > 478		return (enum am65_cpsw_tx_buf_type)k3_cppi_desc_pool_desc_info(tx_chn->desc_pool,
   479									       desc_idx);
   480	}
   481	

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https://github.com/intel/lkp-tests/wiki