Re: [PATCH net-next V2] net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)

[kbuild test robot]

Hi,

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Netanel-Belgazal/net-ena-Add-a-driver-for-Amazon-Elastic-Network-Adapters-ENA/20160707-142005
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/amazon/ena/ena_com.c: In function 'ena_com_mem_addr_set':
>> drivers/net/ethernet/amazon/ena/ena_com.c:101:33: warning: right shift count >= width of type [-Wshift-count-overflow]
     ena_addr->mem_addr_high = addr >> 32;
                                    ^~

vim +101 drivers/net/ethernet/amazon/ena/ena_com.c

    85	
    86	struct ena_com_stats_ctx {
    87		struct ena_admin_aq_get_stats_cmd get_cmd;
    88		struct ena_admin_acq_get_stats_resp get_resp;
    89	};
    90	
    91	static inline int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
    92					       struct ena_common_mem_addr *ena_addr,
    93					       dma_addr_t addr)
    94	{
    95		if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) {
    96			pr_err("dma address has more bits that the device supports\n");
    97			return -EINVAL;
    98		}
    99	
   100		ena_addr->mem_addr_low = (u32)addr;
 > 101		ena_addr->mem_addr_high = addr >> 32;
   102	
   103		return 0;
   104	}
   105	
   106	static int ena_com_admin_init_sq(struct ena_com_admin_queue *queue)
   107	{
   108		struct ena_com_admin_sq *sq = &queue->sq;
   109		u16 size = ADMIN_SQ_SIZE(queue->q_depth);

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0-DAY kernel test infrastructure                Open Source Technology Center
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