[PATCH] wifi: mt76: mmio_(read|write)_copy byte swap when on Big Endian

[kernel test robot]

Hi Caleb,

kernel test robot noticed the following build warnings:

[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main linus/master v6.18-rc3 next-20251031]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Caleb-James-DeLisle/wifi-mt76-mmio_-read-write-_copy-byte-swap-when-on-Big-Endian/20251028-012349
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20251027171759.1484844-1-cjd%40cjdns.fr
patch subject: [PATCH] wifi: mt76: mmio_(read|write)_copy byte swap when on Big Endian
config: loongarch-randconfig-r111-20251101 (https://download.01.org/0day-ci/archive/20251102/202511020028.smeiQhNk-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251102/202511020028.smeiQhNk-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511020028.smeiQhNk-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   drivers/net/wireless/mediatek/mt76/mmio.c:41:24: sparse: sparse: cast from restricted __le32
>> drivers/net/wireless/mediatek/mt76/mmio.c:41:24: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected unsigned int [usertype] value @@     got restricted __le32 [usertype] @@
   drivers/net/wireless/mediatek/mt76/mmio.c:41:24: sparse:     expected unsigned int [usertype] value
   drivers/net/wireless/mediatek/mt76/mmio.c:41:24: sparse:     got restricted __le32 [usertype]
   drivers/net/wireless/mediatek/mt76/mmio.c:63:23: sparse: sparse: cast to restricted __le32

vim +41 drivers/net/wireless/mediatek/mt76/mmio.c

    32	
    33	static void mt76_mmio_write_copy_portable(void __iomem *dst,
    34						  const u8 *src, int len)
    35	{
    36		__le32 val;
    37		int i = 0;
    38	
    39		for (i = 0; i < ALIGN(len, 4); i += 4) {
    40			memcpy(&val, src + i, sizeof(val));
  > 41			writel(cpu_to_le32(val), dst + i);
    42		}
    43	}
    44	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki